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Calculate difference in keys contained in two Python dictionaries
Suppose I have two Python dictionaries - dictA and dictB . I need to find out if there are any keys which are present in dictB but not in dictA . What is the fastest way to go about it?
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Changing user agent on urllib2.urlopen
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Setting the User-Agent from everyone's favorite Dive Into Python.
The short story: You can use Request.add_header to do this.
You can also pass the headers as a dictionary when creating the Request itself, as the docs note:
headers should be a dictionary, and will be treated a...
What's the difference between lists and tuples?
...tial advantages.
There are some interesting articles on this issue, e.g. "Python Tuples are Not Just Constant Lists" or "Understanding tuples vs. lists in Python". The official Python documentation also mentions this
"Tuples are immutable, and usually contain an heterogeneous sequence ...".
I...
Is it possible to write data to file using only JavaScript?
...nload a html file as .html in firefox v76 on Windows 10. The download has .pdf appended to the end of it.
– CSchwarz
May 8 at 3:43
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Greenlet Vs. Threads
...can achieve with threads is significantly less. Additionally, threading in Python is more expensive and more limited than usual due to the GIL. Alternatives to concurrency are usually projects like Twisted, libevent, libuv, node.js etc, where all your code shares the same execution context, and regi...
How do I print the full value of a long string in gdb?
... I was wondering what "x/300sb" meant. With the help of this cheat sheet (pdf), I've translated "x/300sb cstr" as "eXamine 300 units (Bytes) of memory at address cstr, interpreted as a NULL-terminated string (S).". If your string has length 100, then you will see lots of garbage, because all 300 by...
How to duplicate sys.stdout to a log file?
...my question to also ask: What is the best way to accomplish logging when a python app is making a lot of system calls?
17 A...
How to generate random number with the specific length in python
...an just do it as a oneliner:
'{:03}'.format(random.randrange(1, 10**3))
python 3.6+ only oneliner:
f'{random.randrange(1, 10**3):03}'
Example outputs of the above are:
'026'
'255'
'512'
Implemented as a function:
import random
def n_len_rand(len_, floor=1):
top = 10**len_
if flo...
Skip the headers when editing a csv file using Python
I am using below referred code to edit a csv using Python. Functions called in the code form upper part of the code.
3 Ans...
python: SyntaxError: EOL while scanning string literal
...ut eight lines with " \" at the very end, was missing a " \" on one line.
Python IDLE didn't specify a line number that this error was on, but it red-highlighted a totally correct variable assignment statement, throwing me off. The actual misshapen string statement (multiple lines long with " \") ...