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iplib.py => core/iplib.py and updated tests and imports.
iplib.py => core/iplib.py and updated tests and imports.

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r2027:bff26de7
r2028:3b7a36a1
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history.py
257 lines | 7.7 KiB | text/x-python | PythonLexer
vivainio
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r851 # -*- coding: utf-8 -*-
""" History related magics and functionality """
fperez
Add -f flag to %history to direct output to file
r960 # Stdlib imports
vivainio
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r851 import fnmatch
fperez
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r960 import os
Brian Granger
genutils.py => utils/genutils.py and updated imports and tests.
r2023 from IPython.utils.genutils import Term, ask_yes_no, warn
Brian Granger
ipapi.py => core/ipapi.py and imports updated.
r2027 from IPython.core import ipapi
vivainio
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r851
def magic_history(self, parameter_s = ''):
"""Print input history (_i<n> variables), with most recent last.
%history -> print at most 40 inputs (some may be multi-line)\\
%history n -> print at most n inputs\\
%history n1 n2 -> print inputs between n1 and n2 (n2 not included)\\
Each input's number <n> is shown, and is accessible as the
automatically generated variable _i<n>. Multi-line statements are
printed starting at a new line for easy copy/paste.
Options:
-n: do NOT print line numbers. This is useful if you want to get a
printout of many lines which can be directly pasted into a text
editor.
This feature is only available if numbered prompts are in use.
-t: (default) print the 'translated' history, as IPython understands it.
IPython filters your input and converts it all into valid Python source
before executing it (things like magics or aliases are turned into
function calls, for example). With this option, you'll see the native
history instead of the user-entered version: '%cd /' will be seen as
'_ip.magic("%cd /")' instead of '%cd /'.
-r: print the 'raw' history, i.e. the actual commands you typed.
-g: treat the arg as a pattern to grep for in (full) history.
This includes the "shadow history" (almost all commands ever written).
Use '%hist -g' to show full shadow history (may be very long).
In shadow history, every index nuwber starts with 0.
fperez
Forgot to commit docstring about this feature
r961
-f FILENAME: instead of printing the output to the screen, redirect it to
the given file. The file is always overwritten, though IPython asks for
confirmation first if it already exists.
vivainio
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r851 """
ip = self.api
shell = self.shell
if not shell.outputcache.do_full_cache:
print 'This feature is only available if numbered prompts are in use.'
return
fperez
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r960 opts,args = self.parse_options(parameter_s,'gntsrf:',mode='list')
# Check if output to specific file was requested.
try:
outfname = opts['f']
except KeyError:
Fernando Perez
Fix a number of bugs with %history, add proper tests....
r1762 outfile = Term.cout # default
fperez
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r960 # We don't want to close stdout at the end!
close_at_end = False
else:
if os.path.exists(outfname):
Fernando Perez
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r1762 if not ask_yes_no("File %r exists. Overwrite?" % outfname):
fperez
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r960 print 'Aborting.'
return
vivainio
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r851
Fernando Perez
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r1762 outfile = open(outfname,'w')
close_at_end = True
if 't' in opts:
vivainio
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r851 input_hist = shell.input_hist
Fernando Perez
Fix a number of bugs with %history, add proper tests....
r1762 elif 'r' in opts:
vivainio
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r851 input_hist = shell.input_hist_raw
else:
input_hist = shell.input_hist
Fernando Perez
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r1762
vivainio
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r851 default_length = 40
pattern = None
Fernando Perez
Fix a number of bugs with %history, add proper tests....
r1762 if 'g' in opts:
vivainio
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r851 init = 1
final = len(input_hist)
parts = parameter_s.split(None,1)
if len(parts) == 1:
parts += '*'
head, pattern = parts
pattern = "*" + pattern + "*"
elif len(args) == 0:
final = len(input_hist)
init = max(1,final-default_length)
elif len(args) == 1:
final = len(input_hist)
init = max(1,final-int(args[0]))
elif len(args) == 2:
init,final = map(int,args)
else:
warn('%hist takes 0, 1 or 2 arguments separated by spaces.')
print self.magic_hist.__doc__
return
width = len(str(final))
line_sep = ['','\n']
print_nums = not opts.has_key('n')
found = False
if pattern is not None:
sh = ip.IP.shadowhist.all()
for idx, s in sh:
if fnmatch.fnmatch(s, pattern):
print "0%d: %s" %(idx, s)
found = True
if found:
print "==="
fperez
Add -f flag to %history to direct output to file
r960 print "shadow history ends, fetch by %rep <number> (must start with 0)"
vivainio
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r851 print "=== start of normal history ==="
for in_num in range(init,final):
inline = input_hist[in_num]
if pattern is not None and not fnmatch.fnmatch(inline, pattern):
continue
multiline = int(inline.count('\n') > 1)
if print_nums:
fperez
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r960 print >> outfile, \
'%s:%s' % (str(in_num).ljust(width),line_sep[multiline]),
print >> outfile, inline,
if close_at_end:
outfile.close()
vivainio
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r851
def magic_hist(self, parameter_s=''):
"""Alternate name for %history."""
return self.magic_history(parameter_s)
def rep_f(self, arg):
r""" Repeat a command, or get command to input line for editing
- %rep (no arguments):
Place a string version of last computation result (stored in the special '_'
variable) to the next input prompt. Allows you to create elaborate command
lines without using copy-paste::
$ l = ["hei", "vaan"]
$ "".join(l)
==> heivaan
$ %rep
$ heivaan_ <== cursor blinking
%rep 45
Place history line 45 to next input prompt. Use %hist to find out the
number.
%rep 1-4 6-7 3
Repeat the specified lines immediately. Input slice syntax is the same as
in %macro and %save.
%rep foo
Place the most recent line that has the substring "foo" to next input.
Fernando Perez
Fix a number of bugs with %history, add proper tests....
r1762 (e.g. 'svn ci -m foobar').
vivainio
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r851 """
opts,args = self.parse_options(arg,'',mode='list')
ip = self.api
if not args:
ip.set_next_input(str(ip.user_ns["_"]))
return
if len(args) == 1 and not '-' in args[0]:
arg = args[0]
if len(arg) > 1 and arg.startswith('0'):
# get from shadow hist
num = int(arg[1:])
line = self.shadowhist.get(num)
ip.set_next_input(str(line))
return
try:
num = int(args[0])
ip.set_next_input(str(ip.IP.input_hist_raw[num]).rstrip())
return
except ValueError:
pass
for h in reversed(self.shell.input_hist_raw):
if 'rep' in h:
continue
if fnmatch.fnmatch(h,'*' + arg + '*'):
ip.set_next_input(str(h).rstrip())
return
try:
lines = self.extract_input_slices(args, True)
print "lines",lines
ip.runlines(lines)
except ValueError:
print "Not found in recent history:", args
_sentinel = object()
class ShadowHist:
def __init__(self,db):
# cmd => idx mapping
self.curidx = 0
self.db = db
Ville M. Vainio
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r1686 self.disabled = False
vivainio
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r851
def inc_idx(self):
idx = self.db.get('shadowhist_idx', 1)
self.db['shadowhist_idx'] = idx + 1
return idx
def add(self, ent):
Ville M. Vainio
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r1686 if self.disabled:
vivainio
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r851 return
Ville M. Vainio
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r1686 try:
old = self.db.hget('shadowhist', ent, _sentinel)
if old is not _sentinel:
return
newidx = self.inc_idx()
#print "new",newidx # dbg
self.db.hset('shadowhist',ent, newidx)
except:
Brian Granger
ipapi.py => core/ipapi.py and imports updated.
r2027 ipapi.get().IP.showtraceback()
Ville M. Vainio
disable shadow history on file system failure
r1686 print "WARNING: disabling shadow history"
self.disabled = True
vivainio
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r851
def all(self):
d = self.db.hdict('shadowhist')
items = [(i,s) for (s,i) in d.items()]
items.sort()
return items
def get(self, idx):
all = self.all()
for k, v in all:
#print k,v
if k == idx:
return v
def init_ipython(ip):
Fernando Perez
Fix a number of bugs with %history, add proper tests....
r1762 import ipy_completers
vivainio
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r851 ip.expose_magic("rep",rep_f)
ip.expose_magic("hist",magic_hist)
ip.expose_magic("history",magic_history)
ipy_completers.quick_completer('%hist' ,'-g -t -r -n')