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add a string prefix to each value in a string column using Pandas
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If you load you table file with dtype=str
or convert column type to string df['a'] = df['a'].astype(str)
then you can use such approach:
df['a']= 'col' + df['a'].str[:]
This approach allows prepend, append, and subset string of df.
Works on Pandas v0.23.4, v0.24.1. ...
Copy constructor versus Clone()
...e Clone() method on ICloneable should be a deep or shallow clone, thus the interface is semantically broken as your callers won't know whether the call will deep or shallow clone the object.
Instead, you should define your own IDeepCloneable (and IShallowCloneable) interfaces with DeepClone() (and ...
Best way to implement request throttling in ASP.NET MVC?
... executing this decorated route again.
/// </summary>
public int Seconds { get; set; }
/// <summary>
/// A text message that will be sent to the client upon throttling. You can include the token {n} to
/// show this.Seconds in the message, e.g. "Wait {n} seconds bef...
error: Unable to find vcvarsall.bat
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You can also wheel convert ....exe these installers and then install them with pip whenever you like.
– Zooba
Sep 29 '14 at 22:27
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In pure functional languages, is there an algorithm to get the inverse function?
...e was this message to -cafe, with an evil hack for inverting put functions into any record structures deriving Data: haskell.org/pipermail/haskell-cafe/2008-April/042193.html using an approach similar to that later presented (more rigorously, more generally, more principled, etc.) in "for free".
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Binding a WPF ComboBox to a custom list
...code-behind:
namespace WpfApplication6
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
ConnectionViewModel vm = new Connec...
Python progression path - From apprentice to guru
...nd challenging. An URL shortener? Sure, I can do that. Oh, I learnt how to convert numbers from one base to another as a side effect!
This is valid whatever your skill level. You never stop learning. By actively coding in your spare time you will, with little additional effort, come to understand t...
django urls without a trailing slash do not redirect
...MiddlewareAppendSlashWithoutRedirect(CommonMiddleware):
""" This class converts HttpSmartRedirectResponse to the common response
of Django view, without redirect.
"""
response_redirect_class = HttpSmartRedirectResponse
def __init__(self, *args, **kwargs):
# create dj...
Generate pdf from HTML in div using Javascript
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it doesn't convert images
– Probosckie
Mar 4 '17 at 9:11
1
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Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
...ven if a & b are integers, the ranges are different. Only when each is converted to an array are they the same. A specific counterexample exists in the accepted answer.
– Andrew Marshall
Jul 10 '15 at 12:36
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