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correct way to define class variables in Python [duplicate]
...ample explains the difference between the styles:
james@bodacious-wired:~$cat test.py
#!/usr/bin/env python
class MyClass:
element1 = "Hello"
def __init__(self):
self.element2 = "World"
obj = MyClass()
print dir(MyClass)
print "--"
print dir(obj)
print "--"
print obj.element1
...
Pip install Matplotlib error with virtualenv
...dev
sudo apt-get install libfreetype6-dev
Ubuntu https://apps.ubuntu.com/cat/applications/libpng12-0/
or using following command
sudo apt-get install libpng12-0
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Python base64 data decode
...nted out an even simpler solution: base64 -d
So you can use it like this:
cat "FILE WITH STRING" | base64 -d > OUTPUTFILE
#Or You Can Do This
echo "STRING" | base64 -d > OUTPUTFILE
That will save the decoded string to outputfile and then attempt to identify file-type using either the file t...
Execute bash script from URL
...m/myscript.txt)
It may be clearer if you look at the output of echo <(cat /dev/null)
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...行。
12. 一个验证passwd文件有效性的例子
$ cat /etc/passwd | awk -F: '\ NF != 7{\ printf("line %d,does not have 7 fields:%s\n",NR,$0)}\ $1 !~ /[A-Za-z0-9]/{printf("line %d,non alpha and numeric user id:%d: %s\n,NR,$0)}\ $2 == "*" {printf("line %d, no password: %s\n",NR...
How to correct TypeError: Unicode-objects must be encoded before hashing?
... answered Sep 28 '11 at 15:09
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Multiplication on command line terminal
... assigning via k. I certainly remember the default precision being 0 (truncation to integer). Am I mis-remembering, or is it simply that newer implementations have changed behavior?
– William Pursell
Jun 15 '12 at 1:32
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Why do we need RESTful Web Services?
...ze the coupling between client and server components in a distributed application.
This may be the case if your server is going to be used by many different clients that you do not have control over. It may also be the case if you want to be able to update the server regularly without needing to u...
using awk with column value conditions
...
please try this
echo $VAR | grep ClNonZ | awk '{print $3}';
or
echo cat filename | grep ClNonZ | awk '{print $3}';
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.gitignore after commit [duplicate]
...the files.
Note In the presence of tags, always use the --tag-name-filter cat option to git filter-branch. It never hurts and will save you the head-ache when you realize later taht you needed it
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