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Backporting Python 3 open(encoding=“utf-8”) to Python 2
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178
1. To get an encoding parameter in Python 2:
If you only need to support Python 2.6 and 2.7 yo...
When should I use @classmethod and when def method(self)?
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In [6]: class Foo(object): some_static = staticmethod(lambda x: x+1)
In [7]: Foo.some_static(1)
Out[7]: 2
In [8]: Foo().some_static(1)
Out[8]: 2
In [9]: class Bar(Foo): some_static = staticmethod(lambda x: x*2)
In [10]: Bar.some_static(1)
Out[10]: 2
In [11]: Bar().some_static(1)
Out[11...
Change one value based on another value in pandas
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186
One option is to use Python's slicing and indexing features to logically evaluate the places w...
How to escape a single quote inside awk
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163
This maybe what you're looking for:
awk 'BEGIN {FS=" ";} {printf "'\''%s'\'' ", $1}'
That i...
jQuery selector for inputs with square brackets in the name attribute
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edited Jun 24 '14 at 14:27
answered Mar 2 '10 at 17:00
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How to shift a column in Pandas DataFrame
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156
In [18]: a
Out[18]:
x1 x2
0 0 5
1 1 6
2 2 7
3 3 8
4 4 9
In [19]: a.x...
Regex how to match an optional character
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Use
[A-Z]?
to make the letter optional. {1} is redundant. (Of course you could also write [A-Z]{0,1} which would mean the same, but that's what the ? is there for.)
You could improve your regex to
^([0-9]{5})+\s+([A-Z]?)\s+([A-Z])([0-9]{3})([0-9]{3})([A-Z]{3})([A-...
MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
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Tuning nginx worker_process to obtain 100k hits per min
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How can I access “static” class variables within class methods in Python?
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169
Instead of bar use self.bar or Foo.bar. Assigning to Foo.bar will create a static variable, an...