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"""Extract reference documentation from the NumPy source tree.
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"""
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import inspect
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import textwrap
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import re
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import pydoc
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from StringIO import StringIO
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from warnings import warn
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4
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class Reader(object):
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"""A line-based string reader.
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"""
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def __init__(self, data):
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"""
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Parameters
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----------
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data : str
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String with lines separated by '\n'.
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"""
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if isinstance(data,list):
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self._str = data
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else:
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self._str = data.split('\n') # store string as list of lines
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self.reset()
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def __getitem__(self, n):
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return self._str[n]
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def reset(self):
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self._l = 0 # current line nr
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def read(self):
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if not self.eof():
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out = self[self._l]
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self._l += 1
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return out
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else:
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return ''
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def seek_next_non_empty_line(self):
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for l in self[self._l:]:
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if l.strip():
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break
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else:
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self._l += 1
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def eof(self):
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return self._l >= len(self._str)
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def read_to_condition(self, condition_func):
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start = self._l
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for line in self[start:]:
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if condition_func(line):
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return self[start:self._l]
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self._l += 1
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if self.eof():
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return self[start:self._l+1]
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return []
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def read_to_next_empty_line(self):
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self.seek_next_non_empty_line()
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def is_empty(line):
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return not line.strip()
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return self.read_to_condition(is_empty)
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def read_to_next_unindented_line(self):
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def is_unindented(line):
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return (line.strip() and (len(line.lstrip()) == len(line)))
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return self.read_to_condition(is_unindented)
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def peek(self,n=0):
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if self._l + n < len(self._str):
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return self[self._l + n]
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else:
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return ''
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def is_empty(self):
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return not ''.join(self._str).strip()
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class NumpyDocString(object):
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def __init__(self,docstring):
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docstring = textwrap.dedent(docstring).split('\n')
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self._doc = Reader(docstring)
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self._parsed_data = {
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'Signature': '',
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'Summary': [''],
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'Extended Summary': [],
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'Parameters': [],
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'Returns': [],
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'Raises': [],
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'Warns': [],
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'Other Parameters': [],
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'Attributes': [],
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'Methods': [],
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'See Also': [],
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'Notes': [],
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'Warnings': [],
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'References': '',
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'Examples': '',
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'index': {}
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}
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self._parse()
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def __getitem__(self,key):
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return self._parsed_data[key]
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def __setitem__(self,key,val):
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if not self._parsed_data.has_key(key):
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warn("Unknown section %s" % key)
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else:
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self._parsed_data[key] = val
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def _is_at_section(self):
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self._doc.seek_next_non_empty_line()
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if self._doc.eof():
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return False
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l1 = self._doc.peek().strip() # e.g. Parameters
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if l1.startswith('.. index::'):
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return True
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l2 = self._doc.peek(1).strip() # ---------- or ==========
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return l2.startswith('-'*len(l1)) or l2.startswith('='*len(l1))
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def _strip(self,doc):
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i = 0
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j = 0
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for i,line in enumerate(doc):
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if line.strip(): break
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for j,line in enumerate(doc[::-1]):
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if line.strip(): break
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return doc[i:len(doc)-j]
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def _read_to_next_section(self):
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section = self._doc.read_to_next_empty_line()
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while not self._is_at_section() and not self._doc.eof():
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if not self._doc.peek(-1).strip(): # previous line was empty
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section += ['']
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section += self._doc.read_to_next_empty_line()
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return section
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def _read_sections(self):
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while not self._doc.eof():
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data = self._read_to_next_section()
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name = data[0].strip()
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if name.startswith('..'): # index section
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yield name, data[1:]
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elif len(data) < 2:
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yield StopIteration
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else:
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yield name, self._strip(data[2:])
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def _parse_param_list(self,content):
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r = Reader(content)
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params = []
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while not r.eof():
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header = r.read().strip()
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if ' : ' in header:
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arg_name, arg_type = header.split(' : ')[:2]
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else:
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arg_name, arg_type = header, ''
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desc = r.read_to_next_unindented_line()
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desc = dedent_lines(desc)
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params.append((arg_name,arg_type,desc))
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return params
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_name_rgx = re.compile(r"^\s*(:(?P<role>\w+):`(?P<name>[a-zA-Z0-9_.-]+)`|"
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r" (?P<name2>[a-zA-Z0-9_.-]+))\s*", re.X)
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def _parse_see_also(self, content):
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"""
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func_name : Descriptive text
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continued text
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another_func_name : Descriptive text
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func_name1, func_name2, :meth:`func_name`, func_name3
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"""
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items = []
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def parse_item_name(text):
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"""Match ':role:`name`' or 'name'"""
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m = self._name_rgx.match(text)
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if m:
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g = m.groups()
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if g[1] is None:
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return g[3], None
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else:
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return g[2], g[1]
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raise ValueError("%s is not a item name" % text)
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def push_item(name, rest):
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if not name:
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return
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name, role = parse_item_name(name)
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items.append((name, list(rest), role))
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del rest[:]
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current_func = None
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rest = []
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for line in content:
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if not line.strip(): continue
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m = self._name_rgx.match(line)
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if m and line[m.end():].strip().startswith(':'):
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push_item(current_func, rest)
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current_func, line = line[:m.end()], line[m.end():]
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rest = [line.split(':', 1)[1].strip()]
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if not rest[0]:
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rest = []
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elif not line.startswith(' '):
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push_item(current_func, rest)
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current_func = None
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if ',' in line:
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for func in line.split(','):
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push_item(func, [])
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elif line.strip():
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current_func = line
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elif current_func is not None:
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rest.append(line.strip())
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push_item(current_func, rest)
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return items
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def _parse_index(self, section, content):
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"""
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.. index: default
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:refguide: something, else, and more
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"""
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def strip_each_in(lst):
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return [s.strip() for s in lst]
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out = {}
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section = section.split('::')
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if len(section) > 1:
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out['default'] = strip_each_in(section[1].split(','))[0]
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for line in content:
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line = line.split(':')
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if len(line) > 2:
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out[line[1]] = strip_each_in(line[2].split(','))
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return out
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def _parse_summary(self):
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"""Grab signature (if given) and summary"""
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if self._is_at_section():
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return
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summary = self._doc.read_to_next_empty_line()
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summary_str = " ".join([s.strip() for s in summary]).strip()
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if re.compile('^([\w., ]+=)?\s*[\w\.]+\(.*\)$').match(summary_str):
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self['Signature'] = summary_str
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if not self._is_at_section():
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self['Summary'] = self._doc.read_to_next_empty_line()
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else:
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self['Summary'] = summary
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if not self._is_at_section():
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self['Extended Summary'] = self._read_to_next_section()
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def _parse(self):
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self._doc.reset()
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self._parse_summary()
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for (section,content) in self._read_sections():
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if not section.startswith('..'):
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section = ' '.join([s.capitalize() for s in section.split(' ')])
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if section in ('Parameters', 'Attributes', 'Methods',
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'Returns', 'Raises', 'Warns'):
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self[section] = self._parse_param_list(content)
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elif section.startswith('.. index::'):
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self['index'] = self._parse_index(section, content)
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elif section == 'See Also':
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self['See Also'] = self._parse_see_also(content)
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else:
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self[section] = content
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# string conversion routines
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def _str_header(self, name, symbol='-'):
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return [name, len(name)*symbol]
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def _str_indent(self, doc, indent=4):
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out = []
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for line in doc:
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out += [' '*indent + line]
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return out
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def _str_signature(self):
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if self['Signature']:
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return [self['Signature'].replace('*','\*')] + ['']
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else:
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return ['']
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def _str_summary(self):
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if self['Summary']:
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return self['Summary'] + ['']
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else:
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return []
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def _str_extended_summary(self):
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if self['Extended Summary']:
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return self['Extended Summary'] + ['']
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else:
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return []
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def _str_param_list(self, name):
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out = []
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if self[name]:
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out += self._str_header(name)
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for param,param_type,desc in self[name]:
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out += ['%s : %s' % (param, param_type)]
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out += self._str_indent(desc)
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out += ['']
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return out
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def _str_section(self, name):
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out = []
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if self[name]:
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out += self._str_header(name)
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out += self[name]
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out += ['']
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return out
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def _str_see_also(self, func_role):
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if not self['See Also']: return []
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out = []
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out += self._str_header("See Also")
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last_had_desc = True
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for func, desc, role in self['See Also']:
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if role:
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link = ':%s:`%s`' % (role, func)
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elif func_role:
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link = ':%s:`%s`' % (func_role, func)
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else:
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link = "`%s`_" % func
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if desc or last_had_desc:
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out += ['']
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out += [link]
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else:
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out[-1] += ", %s" % link
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if desc:
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out += self._str_indent([' '.join(desc)])
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last_had_desc = True
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else:
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last_had_desc = False
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out += ['']
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return out
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def _str_index(self):
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idx = self['index']
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out = []
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out += ['.. index:: %s' % idx.get('default','')]
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for section, references in idx.iteritems():
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if section == 'default':
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continue
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out += [' :%s: %s' % (section, ', '.join(references))]
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return out
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def __str__(self, func_role=''):
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out = []
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out += self._str_signature()
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out += self._str_summary()
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out += self._str_extended_summary()
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for param_list in ('Parameters','Returns','Raises'):
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out += self._str_param_list(param_list)
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out += self._str_section('Warnings')
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out += self._str_see_also(func_role)
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for s in ('Notes','References','Examples'):
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out += self._str_section(s)
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out += self._str_index()
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return '\n'.join(out)
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def indent(str,indent=4):
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indent_str = ' '*indent
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if str is None:
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return indent_str
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lines = str.split('\n')
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return '\n'.join(indent_str + l for l in lines)
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def dedent_lines(lines):
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"""Deindent a list of lines maximally"""
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return textwrap.dedent("\n".join(lines)).split("\n")
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def header(text, style='-'):
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return text + '\n' + style*len(text) + '\n'
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class FunctionDoc(NumpyDocString):
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def __init__(self, func, role='func', doc=None):
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self._f = func
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self._role = role # e.g. "func" or "meth"
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if doc is None:
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doc = inspect.getdoc(func) or ''
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try:
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NumpyDocString.__init__(self, doc)
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except ValueError, e:
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print '*'*78
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print "ERROR: '%s' while parsing `%s`" % (e, self._f)
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print '*'*78
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#print "Docstring follows:"
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#print doclines
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#print '='*78
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|
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if not self['Signature']:
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func, func_name = self.get_func()
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try:
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# try to read signature
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argspec = inspect.getargspec(func)
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argspec = inspect.formatargspec(*argspec)
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argspec = argspec.replace('*','\*')
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signature = '%s%s' % (func_name, argspec)
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except TypeError, e:
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signature = '%s()' % func_name
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self['Signature'] = signature
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def get_func(self):
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func_name = getattr(self._f, '__name__', self.__class__.__name__)
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if inspect.isclass(self._f):
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func = getattr(self._f, '__call__', self._f.__init__)
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else:
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func = self._f
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|
return func, func_name
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def __str__(self):
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out = ''
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func, func_name = self.get_func()
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|
signature = self['Signature'].replace('*', '\*')
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roles = {'func': 'function',
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'meth': 'method'}
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if self._role:
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|
if not roles.has_key(self._role):
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print "Warning: invalid role %s" % self._role
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|
out += '.. %s:: %s\n \n\n' % (roles.get(self._role,''),
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|
func_name)
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out += super(FunctionDoc, self).__str__(func_role=self._role)
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return out
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|
class ClassDoc(NumpyDocString):
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|
def __init__(self,cls,modulename='',func_doc=FunctionDoc,doc=None):
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|
|
if not inspect.isclass(cls):
|
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|
raise ValueError("Initialise using a class. Got %r" % cls)
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|
self._cls = cls
|
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|
|
if modulename and not modulename.endswith('.'):
|
|
|
modulename += '.'
|
|
|
self._mod = modulename
|
|
|
self._name = cls.__name__
|
|
|
self._func_doc = func_doc
|
|
|
|
|
|
if doc is None:
|
|
|
doc = pydoc.getdoc(cls)
|
|
|
|
|
|
NumpyDocString.__init__(self, doc)
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|
|
|
|
|
@property
|
|
|
def methods(self):
|
|
|
return [name for name,func in inspect.getmembers(self._cls)
|
|
|
if not name.startswith('_') and callable(func)]
|
|
|
|
|
|
def __str__(self):
|
|
|
out = ''
|
|
|
out += super(ClassDoc, self).__str__()
|
|
|
out += "\n\n"
|
|
|
|
|
|
#for m in self.methods:
|
|
|
# print "Parsing `%s`" % m
|
|
|
# out += str(self._func_doc(getattr(self._cls,m), 'meth')) + '\n\n'
|
|
|
# out += '.. index::\n single: %s; %s\n\n' % (self._name, m)
|
|
|
|
|
|
return out
|
|
|
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|
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|
