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Create a dictionary with list comprehension
...sion:
{key: value for (key, value) in iterable}
Note: this is for Python 3.x (and 2.7 upwards). Formerly in Python 2.6 and earlier, the dict built-in could receive an iterable of key/value pairs, so you can pass it a list comprehension or generator expression. For example:
dict((key, func(key)) fo...
Return multiple columns from pandas apply()
...ue) + ' MB'
s['size_gb'] = locale.format("%.1f", s['size'] / 1024.0 ** 3, grouping=True) + ' GB'
return s
df_test = df_test.append(rows_list)
df_test = df_test.apply(sizes, axis=1)
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Algorithms based on number base systems? [closed]
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Chris Okasaki has a very good chapter in his book Purely Functional Data Structures that discus...
What does “%” (percent) do in PowerShell?
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Why is this jQuery click function not working?
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answered Sep 3 '13 at 22:14
mobiusmobius
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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
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edited May 1 '13 at 4:29
mkenyon
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Delete the first three rows of a dataframe in pandas
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Use iloc:
df = df.iloc[3:]
will give you a new df without the first three rows.
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Elegant way to invert a map in Scala
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answered Feb 25 '10 at 23:59
Daniel C. SobralDaniel C. Sobral
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Why is there no tuple comprehension in Python?
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You can use a generator expression:
tuple(i for i in (1, 2, 3))
but parentheses were already taken for … generator expressions.
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