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Skip rows during csv import pandas
...me of the data that you have obtained from this U.S. Geological Survey database
may not have received Director's approval. ... agency_cd site_no datetime tz_cd 139719_00065 139719_00065_cd
5s 15s 20d 6s 14n 10s USGS 08041780 2018-05-06 00:00 CDT 1.98 A
It would...
How to get the part of a file after the first line that matches a regular expression?
...
Mad Physicist
64.9k1818 gold badges110110 silver badges165165 bronze badges
answered Apr 18 '13 at 16:19
Jos De Gra...
Why use def main()? [duplicate]
...tion could be:
import sys
def main(argv):
# My code here
pass
if __name__ == "__main__":
main(sys.argv)
This means you can call main() from other scripts (or interactive shell) passing custom parameters. This might be useful in unit tests, or when batch-processing. But remember that t...
Define a lambda expression that raises an Exception
...
There is more than one way to skin a Python:
y = lambda: (_ for _ in ()).throw(Exception('foobar'))
Lambdas accept statements. Since raise ex is a statement, you could write a general purpose raiser:
def raise_(ex):
raise ex
y = lambda: raise_(Exception('foobar'))
But if...
How to include PHP files that require an absolute path?
...
This should work
$root = realpath($_SERVER["DOCUMENT_ROOT"]);
include "$root/inc/include1.php";
Edit: added imporvement by aussieviking
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Import a file from a subdirectory?
....org/tutorial/modules.html
In short, you need to put a blank file named
__init__.py
in the "lib" directory.
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...
Should I use a class or dictionary?
...vantage? What happens if you later want to add some code? Where would your __init__ code go?
Classes are for bundling related data (and usually code).
Dictionaries are for storing key-value relationships, where usually the keys are all of the same type, and all the values are also of one type. Occ...
PHP Get name of current directory
...
getcwd();
or
dirname(__FILE__);
or (PHP5)
basename(__DIR__)
http://php.net/manual/en/function.getcwd.php
http://php.net/manual/en/function.dirname.php
You can use basename() to get the trailing part of the path :)
In your case, I'd say y...
Split data frame string column into multiple columns
...
Use stringr::str_split_fixed
library(stringr)
str_split_fixed(before$type, "_and_", 2)
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Dynamic instantiation from string name of a class in dynamically imported module?
...
You can use getattr
getattr(module, class_name)
to access the class. More complete code:
module = __import__(module_name)
class_ = getattr(module, class_name)
instance = class_()
As mentioned below, we may use importlib
import importlib
module = importlib.imp...