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The order of keys in dictionaries
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You could use OrderedDict (requires Python 2.7) or higher.
Also, note that OrderedDict({'a': 1, 'b':2, 'c':3}) won't work since the dict you create with {...} has already forgotten the order of the elements. Instead, you want to use OrderedDict([('a', 1), ('b'...
How to print a dictionary's key?
I would like to print a specific Python dictionary key:
20 Answers
20
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Negation in Python
...xist, but the ! (not) operator doesn't work. I'm not sure how to negate in Python... What's the correct way to do this?
4 A...
retrieve links from web page using python and BeautifulSoup [closed]
...etrieve the links of a webpage and copy the url address of the links using Python?
16 Answers
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python multithreading wait till all threads finished
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In Python3, since Python 3.2 there is a new approach to reach the same result, that I personally prefer to the traditional thread creation/start/join, package concurrent.futures: https://docs.python.org/3/library/concurrent.futu...
Mac OS X - EnvironmentError: mysql_config not found
...irst of all, let me check if I am on the same page as you:
You installed python
You did brew install mysql
You did export PATH=$PATH:/usr/local/mysql/bin
And finally, you did pip install MySQL-Python (or pip3 install mysqlclient if using python 3)
If you did all those steps in the same order, an...
Code for Greatest Common Divisor in Python [closed]
...port gcd
>>> gcd(20,8)
4
Source code from the inspect module in Python 2.7:
>>> print inspect.getsource(gcd)
def gcd(a, b):
"""Calculate the Greatest Common Divisor of a and b.
Unless b==0, the result will have the same sign as b (so that when
b is divided by it, th...
Python CSV error: line contains NULL byte
...o.write(data.replace('\x00', '')) be fo.write(data.replace(b'\x00', b''))? Python 3.6 here...
– Boern
Jan 8 '19 at 9:08
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show 3 more commen...
Python : List of dict, if exists increment a dict value, if not append a new dict
... a dictionary, this is easy:
# This example should work in any version of Python.
# urls_d will contain URL keys, with counts as values, like: {'http://www.google.fr/' : 1 }
urls_d = {}
for url in list_of_urls:
if not url in urls_d:
urls_d[url] = 1
else:
urls_d[url] += 1
T...
Replace console output in Python
I'm wondering how I could create one of those nifty console counters in Python as in certain C/C++-programs.
10 Answers
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