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Replace None with NaN in pandas dataframe
...ata from an SQL database, you can combine this with the answer below. This converts None (which isn't a string) to NaN. Then you can df['column'].replace(nan, "", inplace=True) if say you wanted None to be empty string.
– VISQL
Jul 4 '18 at 12:52
...
How do I close a connection early?
...ot of useful things in the context of a query, such as saving the session, converting the downloaded video, handling all kinds of statistics, etc.
fastcgi_finish_request() can invoke executing shutdown function.
Note: fastcgi_finish_request() has a quirk where calls to flush, print, or echo will...
Is there a way to make ellipsize=“marquee” always scroll?
...iew all focused.
@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
if(focused)
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
@Override
public void onWindowFocusChanged(boolean focused) {
if(focused)
su...
Can't specify the 'async' modifier on the 'Main' method of a console app
...onous console programs in particular. Here's some background info from the intro post:
If "await" sees that the awaitable has not completed, then it acts asynchronously. It tells the awaitable to run the remainder of the method when it completes, and then returns from the async method. Await will a...
runOnUiThread in fragment
I'm trying to convert an Activity to fragment. The error mark on runOnUiThread .
on the past:
6 Answers
...
How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
...AAA.BBB.CCC.DDD:9443 > certs.txt This will extract certs in PEM format.
Convert the cert into DER format as this is what keytool expects, e.g. openssl x509 -in certs.txt -out certs.der -outform DER
Now you want to import this cert into the system default 'cacert' file. Locate the system default '...
PHP function overloading
...ion myFunc() {
for ($i = 0; $i < func_num_args(); $i++) {
printf("Argument %d: %s\n", $i, func_get_arg($i));
}
}
/*
Argument 0: a
Argument 1: 2
Argument 2: 3.5
*/
myFunc('a', 2, 3.5);
share
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How to save all the variables in the current python session?
...__, my_shelf, and imported modules can not be shelved.
#
print('ERROR shelving: {0}'.format(key))
my_shelf.close()
To restore:
my_shelf = shelve.open(filename)
for key in my_shelf:
globals()[key]=my_shelf[key]
my_shelf.close()
print(T)
# Hiya
print(val)
# [1, 2, 3]
...
Getting All Variables In Scope
...ion:
var f = function() {
var x = 0;
console.log(x);
};
You can convert your function to a string:
var s = f + '';
You will get source of function as a string
'function () {\nvar x = 0;\nconsole.log(x);\n}'
Now you can use a parser like esprima to parse function code and find local ...
Java 8 NullPointerException in Collectors.toMap
The Java 8 Collectors.toMap throws a NullPointerException if one of the values is 'null'. I don't understand this behaviour, maps can contain null pointers as value without any problems. Is there a good reason why values cannot be null for Collectors.toMap ?
...