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Find index of last occurrence of a substring in a string
... recent call last):
File "<stdin>", line 1, in <module>
ValueError: substring not found
The difference is when the substring is not found, rfind() returns -1 while rindex() raises an exception ValueError (Python2 link: ValueError).
If you do not want to check the rfind() return cod...
Remove duplicated rows
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Be cautious when using -which, this will lead to error if there are no duplicates, use df[!(duplicated(df)), ] may be safer.
– Jason Goal
Jan 19 '19 at 17:23
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GitHub authentication failing over https, returning wrong email address
...ing fine, but because I then turned on 2FA, my commands were returning the error. I had to sign out of the app, then I could use my Personal access token in my commands as per ele's answer here.
Hopefully that helps someone!
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Disable LESS-CSS Overwriting calc() [duplicate]
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throws ParseError: Syntax Error on line 2
– Tom Roggero
Aug 30 '14 at 3:35
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In where shall I use isset() and !empty()
...d only for variables and not just values, so isset("foobar") will raise an error. As of PHP 5.5, empty supports both variables and expressions.
So your first question should rather be if isset returns true for a variable that holds an empty string. And the answer is:
$var = "";
var_dump(isset($var...
Reload Flask app when template file changes
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If anyone encounters an error that says No such file or directory, try using the relative path as in : extra_dirs = ['./directory/to/watch',]
– Kevin
Jul 15 '15 at 5:44
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List of Timezone ID's for use with FindTimeZoneById() in C#?
...his seems like a really bad idea to hardcode into the view. prone to human error and a real pain to maintain.
– sara
Feb 3 '16 at 9:36
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Check if a number is int or float
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@David: issubclass would be an error, as it works on classes. isinstance checks if a given object is an instance of a class or one of that class's subclasses, so it's perfectly generic. Methinks that isinstance(obj, cls) is equivalent to issubclass(obj.__c...
Using an SSH keyfile with Fabric
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Very useful! If you run into errors like IOError: [Errno 2] No such file or directory: ' /path/to/.ssh/key' or Login password for ' root': just make sure you have no whitespaces in your .ssh/config. It's for example User=root instead of User = root...
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Is Integer Immutable
... not change.
final Integer a = 3;
final Integer b = 3;
a += b; // compile error, the variable `a` is immutable, too.
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