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Filter rows which contain a certain string
...lready posted by the @latemail in the comments above. You can use regular expressions for the second and subsequent arguments of filter like this:
dplyr::filter(df, !grepl("RTB",TrackingPixel))
Since you have not provided the original data, I will add a toy example using the mtcars data set. Imag...
How do I resize an image using PIL and maintain its aspect ratio?
...
Define a maximum size.
Then, compute a resize ratio by taking min(maxwidth/width, maxheight/height).
The proper size is oldsize*ratio.
There is of course also a library method to do this: the method Image.thumbnail.
Below is an (edite...
Reduce left and right margins in matplotlib plot
...
One way to automatically do this is the bbox_inches='tight' kwarg to plt.savefig.
E.g.
import matplotlib.pyplot as plt
import numpy as np
data = np.arange(3000).reshape((100,30))
plt.imshow(data)
plt.savefig('test.png', bbox_inches='tight')
Another way is to use f...
Object of custom type as dictionary key
..._(self, other):
# Not strictly necessary, but to avoid having both x==y and x!=y
# True at the same time
return not(self == other)
The Python dict documentation defines these requirements on key objects, i.e. they must be hashable.
...
In Eclipse, what can cause Package Explorer “red-x” error-icon when all Java sources compile without
...d the resulting application compiles fine. However, I keep getting an "red-x" error notification in the Package Explorer.
2...
How to access random item in list?
...hen randomly pick out a string from that list and display it in a messagebox.
12 Answers
...
How to merge 2 JSON objects from 2 files using jq?
...e * operator. When given two objects, it will merge them recursively. For example,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1": "v...
I'm getting Key error in python
...
A KeyError generally means the key doesn't exist. So, are you sure the path key exists?
From the official python docs:
exception KeyError
Raised when a mapping (dictionary) key is not found in the set of
existing keys.
For example:
>>> mydict = {'a'...
Getting started with F# [closed]
...ogramming F#: A comprehensive guide for writing simple code to solve complex problems by Chris Smith
Expert F# 2.0 (Expert's Voice in F#) by Don Syme, Adam Granicz, and Antonio Cisternino
and in addition to that...
Quick Links
Visual Studio (F# is standard feature of professional editions o...
How to Batch Rename Files in a macOS Terminal?
...or use it in a script.
"${f/_*_/_}" is an application of bash parameter expansion: the (first) substring matching pattern _*_ is replaced with literal _, effectively cutting the middle token from the name.
Note that _*_ is a pattern (a wildcard expression, as also used for globbing), not a regular...