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Regex doesn't work in String.matches()
...ly C++ has an equivalent set of methods - regex_search and regex_match. In Python, re.match only anchors the match at the start of the string (as if it were \Apattern) and Python 3.x has got a nice .fullmatch() method. In JS, Go, PHP and .NET, the there are no regex methods that anchor the match imp...
What does functools.wraps do?
...otation on the values copied over. Fundamentally, it's an extension of the Python philosophy that explicit is better than implicit and special cases aren't special enough to break the rules. (The code is much simpler and the language easier to understand if @wraps must be provided manually, rather t...
How can I check the extension of a file?
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Use pathlib From Python3.4 onwards.
from pathlib import Path
Path('my_file.mp3').suffix == '.mp3'
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How to raise a ValueError?
... name for this function. Adding to the possible confusion is the fact that Python already has a container object method named __contains__() that does something a little different, membership-testing-wise.
def contains(char_string, char):
largest_index = -1
for i, ch in enumerate(char_strin...
Converting Epoch time into the datetime
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see docs.python.org/2/library/time.html#time.strftime for more info in the format string
– georg
Jul 27 '13 at 21:01
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When to use pip requirements file versus install_requires in setup.py?
I'm using pip with virtualenv to package and install some Python libraries.
4 Answers
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How to get numbers after decimal point?
...odulo division approach in multiple languages, whereas the above answer is Python-specific.
– Stew
Feb 3 '15 at 20:17
3
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Algorithm to return all combinations of k elements from n
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May I present my recursive Python solution to this problem?
def choose_iter(elements, length):
for i in xrange(len(elements)):
if length == 1:
yield (elements[i],)
else:
for next in choose_iter(elements[i+1...
How to form tuple column from two columns in Pandas
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in python3, you have to use list. This should work: df['new_col'] = list(zip(df.lat, df.long))
– paulwasit
Nov 2 '16 at 8:06
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Reading JSON from a file?
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In python 3, we can use below method.
Read from file and convert to JSON
import json
from pprint import pprint
# Considering "json_list.json" is a json file
with open('json_list.json') as fd:
json_data = json.load(fd)
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