python.md

Python cheat sheet

To mark python code in markdown script use ```

# import pandas

Pad a number with zeros on the left

From StackOverflow

Strings:

>>> n = '4'
>>> print n.zfill(3)
>>> '004'

And for numbers:

>>> n = 4
>>> print '%03d' % n
>>> 004
>>> print format(4, '03') # python >= 2.6
>>> 004
>>> print '{0:03d}'.format(4)  # python >= 2.6
>>> 004
>>> print('{0:03d}'.format(4))  # python 3
>>> 004

Turn off warnings

Turn them off for a specific function

import warnings

def fxn():
    warnings.warn("deprecated", DeprecationWarning)

with warnings.catch_warnings():
    warnings.simplefilter("ignore")
    fxn()
   

Turn off everything (not condoned):

import warnings
warnings.filterwarnings("ignore")