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Replacing blank values (white space) with NaN in pandas
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If you are exporting the data from the CSV file it can be as simple as this :
df = pd.read_csv(file_csv, na_values=' ')
This will create the data frame as well as replace blank values as Na
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How do I handle the window close event in Tkinter?
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# create a menu bar with an Exit command
menubar = tkinter.Menu(root)
filemenu = tkinter.Menu(menubar, tearoff=0)
filemenu.add_command(label="Exit", command=root.destroy)
menubar.add_cascade(label="File", menu=filemenu)
root.config(menu=menubar)
# create a Text widget with a Scrollbar attached...
AWK: Access captured group from line pattern
...'s based on glenn jackman's answer.
Definition
Add this to your .bash_profile etc.
function regex { gawk 'match($0,/'$1'/, ary) {print ary['${2:-'0'}']}'; }
Usage
Capture regex for each line in file
$ cat filename | regex '.*'
Capture 1st regex capture group for each line in file
$ cat fil...
How to know/change current directory in Python shell?
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File "<stdin>", line 1 os.system('cd c:\Users\Ajeya\Documents\') ^ SyntaxError: EOL while scanning string literal
– AAI
Sep 4 '16 at...
Why use AJAX when WebSockets is available?
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@kanaka, If both of them do large files equally well, then why not simply send everything via websockets? Why bother ajaxing pages/data when everything can be sent via WebSockets? (Let's assume it's already 2020 and all browsers have support for WebSockets)
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Are lists thread-safe?
...ERROR
Exception in thread Thread-63:
Traceback (most recent call last):
File "/Users/zup/.pyenv/versions/3.6.8/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/Users/zup/.pyenv/versions/3.6.8/lib/python3.6/threading.py", line 864, in run
self._target(*self._a...
New line in text area
I tried both but new line is not reflecting while rendering the html file.
How can I do that?
12 Answers
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Installing specific package versions with pip
... MySQL_python
pip install -Iv http://sourceforge.net/projects/mysql-python/files/mysql-python/1.2.2/MySQL-python-1.2.2.tar.gz/download
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UICollectionView's cellForItemAtIndexPath is not being called
... but it appears your missing your delegate and data source. In your header file, make sure you have added these:
<UICollectionViewDelegate, UICollectionViewDataSource>
and in your viewDidLoad method add this:
self.myCollectionView.delegate = self;
self.myCollectionView.dataSource = self;
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Difference between a SOAP message and a WSDL?
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A WSDL (Web Service Definition Language) is a meta-data file that describes the web service.
Things like operation name, parameters etc.
The soap messages are the actual payloads
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