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How to step through Python code to help debug issues?
...e improvement over pdb.
Usage is analogous to pdb, just install it with:
python3 -m pip install --user ipdb
and then add to the line you want to step debug from:
__import__('ipdb').set_trace(context=21)
You likely want to add a shortcut for that from your editor, e.g. for Vim snipmate I have:...
“ImportError: No module named” when trying to run Python script
...ey are both using the same interpreter. This happened to me on Ubuntu:
$ ipython3 -c 'import sys; print(sys.version)'
3.4.2 (default, Jun 19 2015, 11:34:49) \n[GCC 4.9.1]
$ python3 -c 'import sys; print(sys.version)'
3.3.0 (default, Nov 27 2012, 12:11:06) \n[GCC 4.6.3]
And sys.path was different...
How to convert ‘false’ to 0 and ‘true’ to 1 in Python
... @Eulenfuchswiesel This is because map returns an iterator in Python3. To use it as a list, cast it as a list like so: B = list(map(int, B))
– Gigi Bayte 2
Nov 13 '18 at 6:51
...
How to schedule a function to run every hour on Flask?
...ich I made recently, integrated with a basic Flask application:
#!/usr/bin/python3
""" Demonstrating Flask, using APScheduler. """
from apscheduler.schedulers.background import BackgroundScheduler
from flask import Flask
def sensor():
""" Function for test purposes. """
print("Scheduler is...
Node.js quick file server (static files over HTTP)
...
Python3 equivalent: python -m http.server [port] (the mentioned one is for Python2)
– jakub.g
Mar 19 '15 at 18:27
...
How to implement __iter__(self) for a container object (Python)
...wing is a simple example that creates a mapping x -> x * x and works on Python3 extending the ABC mapping.
import collections.abc
class MyMap(collections.abc.Mapping):
def __init__(self, n):
self.n = n
def __getitem__(self, key): # given a key, return it's value
if 0 &l...
case-insensitive list sorting, without lowercasing the result?
...
In python3 you can use
list1.sort(key=lambda x: x.lower()) #Case In-sensitive
list1.sort() #Case Sensitive
share
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...
if A vs if A is not None:
...
@cedbeu, in Python3 they are all much faster, but the is None test was indeed the slowest for me. In pypy they all measured exactly the same :)
– John La Rooy
Mar 25 '13 at 6:09
...
Reading a huge .csv file
...
here's another solution for Python3:
import csv
with open(filename, "r") as csvfile:
datareader = csv.reader(csvfile)
count = 0
for row in datareader:
if row[3] in ("column header", criterion):
doSomething(row)
...
站长投放广告绝对不做的事:Google Adsense和百度联盟广告违规分析 - 更多技...
...大小，将搜索结果或推广内容伪装成为论坛帖子、新闻、下载链接等正文内容，也就是所谓的“与正文混排”。当然并不是说不允许你将广告放在文章内页当中，百度对于这种投放广告的行为作了严格的规定：
1.禁止在违规的...