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""" Fun magic line editor for ipython
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Use this to easily edit lists of strings gradually without crafting long
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list comprehensions.
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'l' is the magic variable name for every line (array element). Save the current
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result (or more exactly, retrieve the last ipython computation result into
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%led work area) by running '%led s'. Just run '%led' to show the current work
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area data.
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Example use:
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[ipython]|25> setups = !ls *setup*.py
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==
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['eggsetup.py', 'setup.py', 'setup_bdist_egg.py']
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[ipython]|26> setups
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<26> ['eggsetup.py', 'setup.py', 'setup_bdist_egg.py']
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[ipython]|27> %led s
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Data set from last result (_)
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<27> ['eggsetup.py', 'setup.py', 'setup_bdist_egg.py']
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[ipython]|28> %led upper
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cmd translated => l.upper()
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<28> ['EGGSETUP.PY', 'SETUP.PY', 'SETUP_BDIST_EGG.PY']
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[ipython]|29> %led
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Magic line editor (for lists of strings)
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current data is:
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['eggsetup.py', 'setup.py', 'setup_bdist_egg.py']
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[ipython]|30> %led upper
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cmd translated => l.upper()
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<30> ['EGGSETUP.PY', 'SETUP.PY', 'SETUP_BDIST_EGG.PY']
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[ipython]|31> %led s
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Data set from last result (_)
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<31> ['EGGSETUP.PY', 'SETUP.PY', 'SETUP_BDIST_EGG.PY']
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[ipython]|32> %led "n:" + l
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<32> ['n:EGGSETUP.PY', 'n:SETUP.PY', 'n:SETUP_BDIST_EGG.PY']
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[ipython]|33> %led s
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Data set from last result (_)
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<33> ['n:EGGSETUP.PY', 'n:SETUP.PY', 'n:SETUP_BDIST_EGG.PY']
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[ipython]|34> %led l.
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l.__add__ l.__gt__ l.__reduce_ex__ l.endswith l.join l.rstrip
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l.__class__ l.__hash__ l.__repr__ l.expandtabs l.ljust l.split
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... (completions for string variable shown ) ...
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"""
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from IPython.core import ipapi
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import pprint
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ip = ipapi.get()
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curdata = []
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def line_edit_f(self, cmd ):
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global curdata
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if not cmd:
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print "Magic line editor (for lists of strings)"
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if curdata:
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print "current data is:"
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pprint.pprint(curdata)
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else:
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print "No current data, you should set it by running '%led s'"
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print "When you have your data in _ (result of last computation)."
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return
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if cmd == 's':
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curdata = ip.ev('_')
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print "Data set from last result (_)"
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newlines = curdata
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else:
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# simple method call, e.g. upper
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if cmd.isalpha():
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cmd = 'l.' + cmd + '()'
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print "cmd translated =>",cmd
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newlines = []
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for l in curdata:
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try:
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l2 = eval(cmd)
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except Exception as e:
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print "Dropping exception",e,"on line:",l
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continue
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newlines.append(l2)
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return newlines
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def line_edit_complete_f(self,event):
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""" Show all string methods in completions """
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if event.symbol.startswith('l.'):
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return ['l.' + func for func in dir('')]
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return dir('') + ['l.' + func for func in dir('')]
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ip.set_hook('complete_command', line_edit_complete_f , str_key = '%led')
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ip.define_magic('led', line_edit_f)
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