##// END OF EJS Templates
Fix example usage of BaseFormatter.for_type_by_name....
Fix example usage of BaseFormatter.for_type_by_name. I propose a small documentation fix for this excellent feature of IPython. The current example doesn't work because the type module and type name are lumped into one string. They must be given as separate strings. See docstring: ``` Signature: BaseFormatter.for_type_by_name(self, type_module, type_name, func=None) ``` For extra clarity, I have added a submodule to this made-up example module so that the pattern is clear.

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test_inputtransformer.py
494 lines | 16.4 KiB | text/x-python | PythonLexer
/ IPython / core / tests / test_inputtransformer.py
import tokenize
import nose.tools as nt
from IPython.testing import tools as tt
from IPython.utils import py3compat
u_fmt = py3compat.u_format
from IPython.core import inputtransformer as ipt
def transform_and_reset(transformer):
transformer = transformer()
def transform(inp):
try:
return transformer.push(inp)
finally:
transformer.reset()
return transform
# Transformer tests
def transform_checker(tests, transformer, **kwargs):
"""Utility to loop over test inputs"""
transformer = transformer(**kwargs)
try:
for inp, tr in tests:
if inp is None:
out = transformer.reset()
else:
out = transformer.push(inp)
nt.assert_equal(out, tr)
finally:
transformer.reset()
# Data for all the syntax tests in the form of lists of pairs of
# raw/transformed input. We store it here as a global dict so that we can use
# it both within single-function tests and also to validate the behavior of the
# larger objects
syntax = \
dict(assign_system =
[(i,py3compat.u_format(o)) for i,o in \
[(u'a =! ls', "a = get_ipython().getoutput('ls')"),
(u'b = !ls', "b = get_ipython().getoutput('ls')"),
(u'c= !ls', "c = get_ipython().getoutput('ls')"),
(u'd == !ls', u'd == !ls'), # Invalid syntax, but we leave == alone.
('x=1', 'x=1'), # normal input is unmodified
(' ',' '), # blank lines are kept intact
# Tuple unpacking
(u"a, b = !echo 'a\\nb'", u"a, b = get_ipython().getoutput(\"echo 'a\\\\nb'\")"),
(u"a,= !echo 'a'", u"a, = get_ipython().getoutput(\"echo 'a'\")"),
(u"a, *bc = !echo 'a\\nb\\nc'", u"a, *bc = get_ipython().getoutput(\"echo 'a\\\\nb\\\\nc'\")"),
# Tuple unpacking with regular Python expressions, not our syntax.
(u"a, b = range(2)", u"a, b = range(2)"),
(u"a, = range(1)", u"a, = range(1)"),
(u"a, *bc = range(3)", u"a, *bc = range(3)"),
]],
assign_magic =
[(i,py3compat.u_format(o)) for i,o in \
[(u'a =% who', "a = get_ipython().run_line_magic('who', '')"),
(u'b = %who', "b = get_ipython().run_line_magic('who', '')"),
(u'c= %ls', "c = get_ipython().run_line_magic('ls', '')"),
(u'd == %ls', u'd == %ls'), # Invalid syntax, but we leave == alone.
('x=1', 'x=1'), # normal input is unmodified
(' ',' '), # blank lines are kept intact
(u"a, b = %foo", u"a, b = get_ipython().run_line_magic('foo', '')"),
]],
classic_prompt =
[('>>> x=1', 'x=1'),
('x=1', 'x=1'), # normal input is unmodified
(' ', ' '), # blank lines are kept intact
],
ipy_prompt =
[('In [1]: x=1', 'x=1'),
('x=1', 'x=1'), # normal input is unmodified
(' ',' '), # blank lines are kept intact
],
# Tests for the escape transformer to leave normal code alone
escaped_noesc =
[ (' ', ' '),
('x=1', 'x=1'),
],
# System calls
escaped_shell =
[(i,py3compat.u_format(o)) for i,o in \
[ (u'!ls', "get_ipython().system('ls')"),
# Double-escape shell, this means to capture the output of the
# subprocess and return it
(u'!!ls', "get_ipython().getoutput('ls')"),
]],
# Help/object info
escaped_help =
[(i,py3compat.u_format(o)) for i,o in \
[ (u'?', 'get_ipython().show_usage()'),
(u'?x1', "get_ipython().run_line_magic('pinfo', 'x1')"),
(u'??x2', "get_ipython().run_line_magic('pinfo2', 'x2')"),
(u'?a.*s', "get_ipython().run_line_magic('psearch', 'a.*s')"),
(u'?%hist1', "get_ipython().run_line_magic('pinfo', '%hist1')"),
(u'?%%hist2', "get_ipython().run_line_magic('pinfo', '%%hist2')"),
(u'?abc = qwe', "get_ipython().run_line_magic('pinfo', 'abc')"),
]],
end_help =
[(i,py3compat.u_format(o)) for i,o in \
[ (u'x3?', "get_ipython().run_line_magic('pinfo', 'x3')"),
(u'x4??', "get_ipython().run_line_magic('pinfo2', 'x4')"),
(u'%hist1?', "get_ipython().run_line_magic('pinfo', '%hist1')"),
(u'%hist2??', "get_ipython().run_line_magic('pinfo2', '%hist2')"),
(u'%%hist3?', "get_ipython().run_line_magic('pinfo', '%%hist3')"),
(u'%%hist4??', "get_ipython().run_line_magic('pinfo2', '%%hist4')"),
(u'f*?', "get_ipython().run_line_magic('psearch', 'f*')"),
(u'ax.*aspe*?', "get_ipython().run_line_magic('psearch', 'ax.*aspe*')"),
(u'a = abc?', "get_ipython().set_next_input('a = abc');"
"get_ipython().run_line_magic('pinfo', 'abc')"),
(u'a = abc.qe??', "get_ipython().set_next_input('a = abc.qe');"
"get_ipython().run_line_magic('pinfo2', 'abc.qe')"),
(u'a = *.items?', "get_ipython().set_next_input('a = *.items');"
"get_ipython().run_line_magic('psearch', '*.items')"),
(u'plot(a?', "get_ipython().set_next_input('plot(a');"
"get_ipython().run_line_magic('pinfo', 'a')"),
(u'a*2 #comment?', 'a*2 #comment?'),
]],
# Explicit magic calls
escaped_magic =
[(i,py3compat.u_format(o)) for i,o in \
[ (u'%cd', "get_ipython().run_line_magic('cd', '')"),
(u'%cd /home', "get_ipython().run_line_magic('cd', '/home')"),
# Backslashes need to be escaped.
(u'%cd C:\\User', "get_ipython().run_line_magic('cd', 'C:\\\\User')"),
(u' %magic', " get_ipython().run_line_magic('magic', '')"),
]],
# Quoting with separate arguments
escaped_quote =
[ (',f', 'f("")'),
(',f x', 'f("x")'),
(' ,f y', ' f("y")'),
(',f a b', 'f("a", "b")'),
],
# Quoting with single argument
escaped_quote2 =
[ (';f', 'f("")'),
(';f x', 'f("x")'),
(' ;f y', ' f("y")'),
(';f a b', 'f("a b")'),
],
# Simply apply parens
escaped_paren =
[ ('/f', 'f()'),
('/f x', 'f(x)'),
(' /f y', ' f(y)'),
('/f a b', 'f(a, b)'),
],
# Check that we transform prompts before other transforms
mixed =
[(i,py3compat.u_format(o)) for i,o in \
[ (u'In [1]: %lsmagic', "get_ipython().run_line_magic('lsmagic', '')"),
(u'>>> %lsmagic', "get_ipython().run_line_magic('lsmagic', '')"),
(u'In [2]: !ls', "get_ipython().system('ls')"),
(u'In [3]: abs?', "get_ipython().run_line_magic('pinfo', 'abs')"),
(u'In [4]: b = %who', "b = get_ipython().run_line_magic('who', '')"),
]],
)
# multiline syntax examples. Each of these should be a list of lists, with
# each entry itself having pairs of raw/transformed input. The union (with
# '\n'.join() of the transformed inputs is what the splitter should produce
# when fed the raw lines one at a time via push.
syntax_ml = \
dict(classic_prompt =
[ [('>>> for i in range(10):','for i in range(10):'),
('... print i',' print i'),
('... ', ''),
],
[('>>> a="""','a="""'),
('... 123"""','123"""'),
],
[('a="""','a="""'),
('... 123','123'),
('... 456"""','456"""'),
],
[('a="""','a="""'),
('>>> 123','123'),
('... 456"""','456"""'),
],
[('a="""','a="""'),
('123','123'),
('... 456"""','... 456"""'),
],
[('....__class__','....__class__'),
],
[('a=5', 'a=5'),
('...', ''),
],
[('>>> def f(x):', 'def f(x):'),
('...', ''),
('... return x', ' return x'),
],
[('board = """....', 'board = """....'),
('....', '....'),
('...."""', '...."""'),
],
],
ipy_prompt =
[ [('In [24]: for i in range(10):','for i in range(10):'),
(' ....: print i',' print i'),
(' ....: ', ''),
],
[('In [24]: for i in range(10):','for i in range(10):'),
# Qt console prompts expand with spaces, not dots
(' ...: print i',' print i'),
(' ...: ', ''),
],
[('In [24]: for i in range(10):','for i in range(10):'),
# Sometimes whitespace preceding '...' has been removed
('...: print i',' print i'),
('...: ', ''),
],
[('In [24]: for i in range(10):','for i in range(10):'),
# Space after last continuation prompt has been removed (issue #6674)
('...: print i',' print i'),
('...:', ''),
],
[('In [2]: a="""','a="""'),
(' ...: 123"""','123"""'),
],
[('a="""','a="""'),
(' ...: 123','123'),
(' ...: 456"""','456"""'),
],
[('a="""','a="""'),
('In [1]: 123','123'),
(' ...: 456"""','456"""'),
],
[('a="""','a="""'),
('123','123'),
(' ...: 456"""',' ...: 456"""'),
],
],
multiline_datastructure_prompt =
[ [('>>> a = [1,','a = [1,'),
('... 2]','2]'),
],
],
multiline_datastructure =
[ [('b = ("%s"', None),
('# comment', None),
('%foo )', 'b = ("%s"\n# comment\n%foo )'),
],
],
multiline_string =
[ [("'''foo?", None),
("bar'''", "'''foo?\nbar'''"),
],
],
leading_indent =
[ [(' print "hi"','print "hi"'),
],
[(' for a in range(5):','for a in range(5):'),
(' a*2',' a*2'),
],
[(' a="""','a="""'),
(' 123"""','123"""'),
],
[('a="""','a="""'),
(' 123"""',' 123"""'),
],
],
cellmagic =
[ [(u'%%foo a', None),
(None, u_fmt("get_ipython().run_cell_magic('foo', 'a', '')")),
],
[(u'%%bar 123', None),
(u'hello', None),
(None , u_fmt("get_ipython().run_cell_magic('bar', '123', 'hello')")),
],
[(u'a=5', 'a=5'),
(u'%%cellmagic', '%%cellmagic'),
],
],
escaped =
[ [('%abc def \\', None),
('ghi', u_fmt("get_ipython().run_line_magic('abc', 'def ghi')")),
],
[('%abc def \\', None),
('ghi\\', None),
(None, u_fmt("get_ipython().run_line_magic('abc', 'def ghi')")),
],
],
assign_magic =
[ [(u'a = %bc de \\', None),
(u'fg', u_fmt("a = get_ipython().run_line_magic('bc', 'de fg')")),
],
[(u'a = %bc de \\', None),
(u'fg\\', None),
(None, u_fmt("a = get_ipython().run_line_magic('bc', 'de fg')")),
],
],
assign_system =
[ [(u'a = !bc de \\', None),
(u'fg', u_fmt("a = get_ipython().getoutput('bc de fg')")),
],
[(u'a = !bc de \\', None),
(u'fg\\', None),
(None, u_fmt("a = get_ipython().getoutput('bc de fg')")),
],
],
)
def test_assign_system():
tt.check_pairs(transform_and_reset(ipt.assign_from_system), syntax['assign_system'])
def test_assign_magic():
tt.check_pairs(transform_and_reset(ipt.assign_from_magic), syntax['assign_magic'])
def test_classic_prompt():
tt.check_pairs(transform_and_reset(ipt.classic_prompt), syntax['classic_prompt'])
for example in syntax_ml['classic_prompt']:
transform_checker(example, ipt.classic_prompt)
for example in syntax_ml['multiline_datastructure_prompt']:
transform_checker(example, ipt.classic_prompt)
# Check that we don't transform the second line if the first is obviously
# IPython syntax
transform_checker([
(u'%foo', '%foo'),
(u'>>> bar', '>>> bar'),
], ipt.classic_prompt)
def test_ipy_prompt():
tt.check_pairs(transform_and_reset(ipt.ipy_prompt), syntax['ipy_prompt'])
for example in syntax_ml['ipy_prompt']:
transform_checker(example, ipt.ipy_prompt)
# Check that we don't transform the second line if we're inside a cell magic
transform_checker([
(u'%%foo', '%%foo'),
(u'In [1]: bar', 'In [1]: bar'),
], ipt.ipy_prompt)
def test_assemble_logical_lines():
tests = \
[ [(u"a = \\", None),
(u"123", u"a = 123"),
],
[(u"a = \\", None), # Test resetting when within a multi-line string
(u"12 *\\", None),
(None, u"a = 12 *"),
],
[(u"# foo\\", u"# foo\\"), # Comments can't be continued like this
],
]
for example in tests:
transform_checker(example, ipt.assemble_logical_lines)
def test_assemble_python_lines():
tests = \
[ [(u"a = '''", None),
(u"abc'''", u"a = '''\nabc'''"),
],
[(u"a = '''", None), # Test resetting when within a multi-line string
(u"def", None),
(None, u"a = '''\ndef"),
],
[(u"a = [1,", None),
(u"2]", u"a = [1,\n2]"),
],
[(u"a = [1,", None), # Test resetting when within a multi-line string
(u"2,", None),
(None, u"a = [1,\n2,"),
],
[(u"a = '''", None), # Test line continuation within a multi-line string
(u"abc\\", None),
(u"def", None),
(u"'''", u"a = '''\nabc\\\ndef\n'''"),
],
] + syntax_ml['multiline_datastructure']
for example in tests:
transform_checker(example, ipt.assemble_python_lines)
def test_help_end():
tt.check_pairs(transform_and_reset(ipt.help_end), syntax['end_help'])
def test_escaped_noesc():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_noesc'])
def test_escaped_shell():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_shell'])
def test_escaped_help():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_help'])
def test_escaped_magic():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_magic'])
def test_escaped_quote():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_quote'])
def test_escaped_quote2():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_quote2'])
def test_escaped_paren():
tt.check_pairs(transform_and_reset(ipt.escaped_commands), syntax['escaped_paren'])
def test_cellmagic():
for example in syntax_ml['cellmagic']:
transform_checker(example, ipt.cellmagic)
line_example = [(u'%%bar 123', None),
(u'hello', None),
(u'' , u_fmt("get_ipython().run_cell_magic('bar', '123', 'hello')")),
]
transform_checker(line_example, ipt.cellmagic, end_on_blank_line=True)
def test_has_comment():
tests = [('text', False),
('text #comment', True),
('text #comment\n', True),
('#comment', True),
('#comment\n', True),
('a = "#string"', False),
('a = "#string" # comment', True),
('a #comment not "string"', True),
]
tt.check_pairs(ipt.has_comment, tests)
@ipt.TokenInputTransformer.wrap
def decistmt(tokens):
"""Substitute Decimals for floats in a string of statements.
Based on an example from the tokenize module docs.
"""
result = []
for toknum, tokval, _, _, _ in tokens:
if toknum == tokenize.NUMBER and '.' in tokval: # replace NUMBER tokens
for newtok in [
(tokenize.NAME, 'Decimal'),
(tokenize.OP, '('),
(tokenize.STRING, repr(tokval)),
(tokenize.OP, ')')
]:
yield newtok
else:
yield (toknum, tokval)
def test_token_input_transformer():
tests = [(u'1.2', u_fmt(u"Decimal ('1.2')")),
(u'"1.2"', u'"1.2"'),
]
tt.check_pairs(transform_and_reset(decistmt), tests)
ml_tests = \
[ [(u"a = 1.2; b = '''x", None),
(u"y'''", u_fmt(u"a =Decimal ('1.2');b ='''x\ny'''")),
],
[(u"a = [1.2,", None),
(u"3]", u_fmt(u"a =[Decimal ('1.2'),\n3 ]")),
],
[(u"a = '''foo", None), # Test resetting when within a multi-line string
(u"bar", None),
(None, u"a = '''foo\nbar"),
],
]
for example in ml_tests:
transform_checker(example, decistmt)