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How to remove all characters after a specific character in python?
..., if you want remove every thing from the character, do this:
mystring = "123⋯567"
mystring[ 0 : mystring.index("⋯")]
>> '123'
If you want to keep the character, add 1 to the character position.
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Set environment variables on Mac OS X Lion
...
First, one thing to recognize about OS X is that it is built on Unix. This is where the .bash_profile comes in. When you start the Terminal app in OS X you get a bash shell by default. The bash shell comes from Unix and when it loads it runs the .bash_profile s...
How to duplicate sys.stdout to a log file?
....6, see below for
# an updated 3.3+-compatible version.
import subprocess, os, sys
# Unbuffer output (this ensures the output is in the correct order)
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
os.dup2(tee.stdin.fileno(), s...
Format Float to n decimal places
...ed the result is a float number, not a string.
– seba123neo
Mar 4 '11 at 18:29
Are you saying you want to round the fl...
What languages are Windows, Mac OS X and Linux written in?
I was just wondering who knows what programming languages Windows, Mac OS X and Linux are made up from and what languages are used for each part of the OS (ie: Kernel, plug-in architecture, GUI components, etc).
...
How can I use a batch file to write to a text file?
...d in D:\Temp\WriteText.bat
@echo off
echo This is a test> test.txt
echo 123>> test.txt
echo 245.67>> test.txt
Output:
D:\Temp>WriteText
D:\Temp>type test.txt
This is a test
123
245.67
D:\Temp>
Notes:
@echo off turns off printing of each command to the console
Unless...
Replace only some groups with Regex
...Group Index and Length properties of a matched group.
var text = "example-123-example";
var pattern = @"-(\d+)-";
var regex = new RegEx(pattern);
var match = regex.Match(text);
var firstPart = text.Substring(0,match.Groups[1].Index);
var secondPart = text.Substring(match.Groups[1].Index + matc...
Python Script execute commands in Terminal
...
There are several ways to do this:
A simple way is using the os module:
import os
os.system("ls -l")
More complex things can be achieved with the subprocess module:
for example:
import subprocess
test = subprocess.Popen(["ping","-W","2","-c", "1", "192.168.1.70"], stdout=subprocess...
How do I get the list of keys in a Dictionary?
...g, int> data = new Dictionary<string, int>();
data.Add("abc", 123);
data.Add("def", 456);
foreach (string key in data.Keys)
{
Console.WriteLine(key);
}
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Java; String replace (using regular expressions)?
...answered Jul 23 '16 at 21:52
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