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Reimport a module in python while interactive
...ment must be a module object, so it must have been successfully imported before. This is useful if you have edited the module source file using an external editor and want to try out the new version without leaving the Python interpreter.
If running Python 3.4 and up, do import importlib, then do ...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...ent', and 6.10.3.1 covers 'argument substitution'.
After the arguments for the invocation of a function-like macro have been identified,
argument substitution takes place. A parameter in the replacement list, unless preceded
by a # or ## preprocessing token or followed by a ## preprocessing ...
Merge PDF files
...n-pypdf-writing-getting-a-valueerror-i-o-operation/6773733#6773733
for input_file in input_files:
input_streams.append(open(input_file, 'rb'))
writer = PdfFileWriter()
for reader in map(PdfFileReader, input_streams):
for n in range(reader.getNumPages()...
Why use String.Format? [duplicate]
Why would anyone use String.Format in C# and VB .NET as opposed to the concatenation operators ( & in VB, and + in C#)?
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Why does sys.exit() not exit when called inside a thread in Python?
... method Deestan described you can call os._exit (notice the underscore). Before using it make sure that you understand that it does no cleanups (like calling __del__ or similar).
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improve thi...
Access nested dictionary items via a list of keys?
...
Use reduce() to traverse the dictionary:
from functools import reduce # forward compatibility for Python 3
import operator
def getFromDict(dataDict, mapList):
return reduce(operator.getitem, mapList, dataDict)
and reuse getFromDict to find the location to store the value for setInDict():
de...
How to use phpexcel to read data and insert into database?
...o read data from excel, Insert into database and then generate pdf reports for specific users.
I searched a lot but nothing specific given about both things.
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Is there a way to 'uniq' by column?
...
sort -u -t, -k1,1 file
-u for unique
-t, so comma is the delimiter
-k1,1 for the key field 1
Test result:
overflow@domain2.com,2009-11-27 00:58:29.793000000,xx3.net,255.255.255.0
stack2@domain.com,2009-11-27 01:05:47.893000000,xx2.net,127.0.0.1
...
Useful code which uses reduce()? [closed]
...
The other uses I've found for it besides + and * were with and and or, but now we have any and all to replace those cases.
foldl and foldr do come up in Scheme a lot...
Here's some cute usages:
Flatten a list
Goal: turn [[1, 2, 3], [4, 5], [6, 7...
How to get the current directory in a C program?
...t the directory that the program is started from. This program is written for UNIX computers. I've been looking at opendir() and telldir() , but telldir() returns a off_t (long int) , so it really doesn't help me.
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