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Purpose of Python's __repr__
...e to create this object. See official documentation here. __repr__ is more for developers while __str__ is for end users.
A simple example:
>>> class Point:
... def __init__(self, x, y):
... self.x, self.y = x, y
... def __repr__(self):
... return 'Point(x=%s, y=%s)' % (self.x...
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.
...
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#)?
...
Python function attributes - uses and abuses [closed]
...
I typically use function attributes as storage for annotations. Suppose I want to write, in the style of C# (indicating that a certain method should be part of the web service interface)
class Foo(WebService):
@webmethod
def bar(self, arg1, arg2):
...
...
Should I URL-encode POST data?
... your "Content-Type" is in the HTTP headers.
A value of "application/x-www-form-urlencoded" means that your POST body will need to be URL encoded just like a GET parameter string. A value of "multipart/form-data" means that you'll be using content delimiters and NOT url encoding the content.
This a...
Multiprocessing: How to use Pool.map on a function defined in a class?
...accept. I wrote the following to circumvent this. It appears to work, even for recursive use of parmap.
from multiprocessing import Process, Pipe
from itertools import izip
def spawn(f):
def fun(pipe, x):
pipe.send(f(x))
pipe.close()
return fun
def parmap(f, X):
pipe = ...
Does reading an entire file leave the file handle open?
...
For a while, there weren't really other Python implementations; but relying on implementation details is not really Pythonic.
– Karl Knechtel
Sep 14 '11 at 0:00
...
Output to the same line overwriting previous output?
...
Here's code for Python 3.x:
print(os.path.getsize(file_name)/1024+'KB / '+size+' KB downloaded!', end='\r')
The end= keyword is what does the work here -- by default, print() ends in a newline (\n) character, but this can be replaced ...
Selecting a row of pandas series/dataframe by integer index
...
Does anyone have a justification for these names? I find these hard to remember because I'm not sure why iloc is rows and loc is labels.
– kilojoules
Apr 5 '17 at 17:58
...
mysql_config not found when installing mysqldb python interface
...
mySQLdb is a python interface for mysql, but it is not mysql itself. And apparently mySQLdb needs the command 'mysql_config', so you need to install that first.
Can you confirm that you did or did not install mysql itself, by running "mysql" from the she...