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How to write to an existing excel file without overwriting data (using pandas)?
...Writer(filename, engine='openpyxl')
# Python 2.x: define [FileNotFoundError] exception if it doesn't exist
try:
FileNotFoundError
except NameError:
FileNotFoundError = IOError
try:
# try to open an existing workbook
writer.book = load_workbook(file...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
...
For those who are getting ERROR: rvm update has been removed. — rvm get latest / rvm get head are the correct ways to upgrade rvm now.
– jibiel
Oct 25 '11 at 8:25
...
How do you push just a single Git branch (and no other branches)?
...u do git push.
Other valid options are:
nothing : Do not push anything (error out) unless a refspec is explicitly given. This is primarily meant for people who want to avoid mistakes by always being explicit.
matching : Push all branches having the same name on both ends. (default option prior to...
Json.net serialize/deserialize derived types?
...
I keep receiving Error resolving type specified in JSON '..., ...'. Path '$type', line 1, position 82. Any ideas?
– briba
Oct 21 '16 at 23:09
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Best implementation for hashCode method for a collection
...tandard implementations/libraries apply (best practices, well tested, less error prone, etc).
– Kissaki
Jan 28 '14 at 13:23
7
...
In Javascript/jQuery what does (e) mean?
...Default();
}, false);
</script>
you will get : 8 and an error:"Uncaught TypeError: e.preventDefault is not a function
at HTMLInputElement. (VM409:69)".
Certainly,the click event will not be prevented this time.Because the "e" was defined again in the function.
However,if you...
Setting different color for each series in scatter plot on matplotlib
...n easy fix
If you have only one type of collections (e.g. scatter with no error bars) you can also change the colours after that you have plotted them, this sometimes is easier to perform.
import matplotlib.pyplot as plt
from random import randint
import numpy as np
#Let's generate some random X,...
A weighted version of random.choice
...
This doesn't work with tuples etc ("ValueError: a must be 1-dimensional"), so in that case one can ask numpy to pick the index into the list, i.e. len(list_of_candidates), and then do list_of_candidates[draw]
– xjcl
Mar 17 '19 ...
Contain form within a bootstrap popover?
...he question. However, having complex markups within html attributes may be error-prone and add risks on maintainability and learnability of the code.
– Ricardo
Nov 28 '17 at 22:24
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Keyboard Interrupts with python's multiprocessing Pool
...fixes the problem for both idle and busy worker processes, and requires no error handling code in your child processes.
import signal
...
def init_worker():
signal.signal(signal.SIGINT, signal.SIG_IGN)
...
def main()
pool = multiprocessing.Pool(size, init_worker)
...
except Ke...