rec

# Version 3
def print_before2(label):
  
    def decorator(func):
      
        @functools.wraps(func)
        def wrapped(*args, **kwds):
            print(label, func.__name__, args, kwds)
            return func(*args, **kwds)
          

rec

# WRONG
def print_before(func, label):
  
    @functools.wraps(func)
    def wrapped(*args, **kwds):
        print(label, func.__name__, args, kwds)
        return func(*args, **kwds)
      
    return wrapped
  

rec

import functools


def print_before(func):
  
    @functools.wraps(func)
    def wrapped(*args, **kwds):
        print(func.__name__, args, kwds)
        return func(*args, **kwds)
      

rec

@print_before
def important(lives, money, valuables=None):
    """Do big, important things!!"""
    pass


>>> important(23, 105.17, valuables=['dogs'])

important (23, 105.17) {'valuables': ['dogs']}

rec

def print_before(func):
    
    def wrapped(*args, **kwds):
        print('Before:', func.__name__, args, kwds)
        return func(*args, **kwds)
    
    return wrapped

rec

fp = open(filename, 'w')
json.dump(data, fp)

rec

  CPU[|                                                            0.4%]   Tasks: 40, 53 thr; 1 running
  Mem[||||||||||||||||||||||||||||||||||||||||||||||||||||||||338M/985M]   Load average: 0.03 0.03 0.00 
  Swp[                                                            0K/0K]   Uptime: 00:31:48

  PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+  Command
 1001 mysql      20   0 1134M  175M 14576 S  0.0 17.8  0:00.00 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid
 1002 mysql      20   0 1134M  175M 14576 S  0.0 17.8  0:00.04 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid
 1003 mysql      20   0 1134M  175M 14576 S  0.0 17.8  0:00.14 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid

rec

$ pip install -r pip-req.txt 
Collecting nose>=1.3.0
  Using cached https://files.pythonhosted.org/packages/15/d8/dd071918c040f50fa1cf80da16423af51ff8ce4a0f2399b7bf8de45ac3d9/nose-1.3.7-py3-none-any.whl
Collecting tox>=1.6.1
  Downloading https://files.pythonhosted.org/packages/77/a7/a5b721d9bf955edfe36013e5ecc9136fc6b2fef622ab1797ff0560273d8e/tox-3.14.3-py2.py3-none-any.whl (80kB)
     |████████████████████████████████| 81kB 1.7MB/s 
Processing /Users/tom/Library/Caches/pip/wheels/b0/eb/ac/80e48148e00b449d5f2b60478c31f1e0fb5ec45b04950e800f/coverage-5.0.3-cp38-cp38-macosx_10_9_x86_64.whl
Collecting pylint>=1.1.0
  Downloading https://files.pythonhosted.org/packages/e9/59/43fc36c5ee316bb9aeb7cf5329cdbdca89e5749c34d5602753827c0aa2dc/pylint-2.4.4-py3-none-any.whl (302kB)
     |████████████████████████████████| 307kB 5.1MB/s 

rec

class Mutable:
  pass


foo, bar = Mutable(), Mutable()
foo.x = 1  # It's mutable!

d = {foo: 'foo', bar: 'bar'}
print(d[foo])

rec

class Dispatch:
    def monday(self): pass  # Implementations here...
    def tuesday(self): pass
    def wednesday(self): pass
    def thursday(self): pass
    def friday(self): pass
    def saturday(self): pass
    def sunday(self): pass