Welcome, guest | Sign In | My Account | Store | Cart

Simple console tool that helps in maintenance your free days from work + basic tutorial how to use argparse in practice. It's clear and few lines of code. Enjoy! :-)

Python, 167 lines
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
Are You still forgetting how many days of leave you have?
Your chief is cheating you?
You don't want to ask everyday & run calculator & compute?
This tool is for you!

   * nice chronological view
   * add/remove your free days
   * automatically computing
   * no external-db dependency
   * easy to maintain / develop / change
   * few lines of code 
"""

__author__ =  'farciarz'
__version__ = '0.01 alpha'

import sys, os
import time
import operator
import cPickle as pickle
import argparse

STATIC_P = 'history.p'
STATIC_T = "%a, %d-%m-%y %H:%M"
PROTOCOL = pickle.HIGHEST_PROTOCOL

OPERATORS = {
    '+': operator.add,
    '-': operator.sub,
    '*': operator.add,
    }

class Log:
    """
    Namespaced list container.
    """
    history = []
    
    @classmethod
    def base(cls):
        """
        Return a current holiday-base value.
        """
        return (item[0] for item in cls.history[::-1] \
                if item[0].startswith('*')).next()

    @classmethod
    def holidays(cls):
        """
        Calculate and return how many leaves day you have.
        """
        item = None
        holidays = 0
        for _tuple in cls.history[::-1]:
            item = _tuple[0]
            if item != cls.base():
                holidays = OPERATORS[item[0:1]](holidays, int(item[1:]))
            else:
                holidays = holidays + int(cls.base()[1:])
                break
        return holidays
    
    @classmethod
    def print_log(cls):
        """
        Show the view.
        """
        for _tuple in Log.history:
            print '\t'.join(_tuple)
        print '---------------------------'
        print '\t\t      ==', Log.holidays()
            
    @classmethod
    def save_log(cls):
        """
        Save the view into some pickle file.
        """
        output = open(STATIC_P, 'wb')
        pickle.dump(Log.history, output, protocol=PROTOCOL)
        output.close()


class Operate(argparse.Action):
    """
    Action, assistance class.
    """
    
    def __call__(self, parser, namespace, values, option_string=None):
        """
        Each action should call this logic.
        """
            
        dis_dict = {'--add': '+',
                    '--remove': '-',
                    '-a': '+',
                    '-rm': '-',
                    '--reset': '*'}
        #debug
        #print '%r %r %r' % (namespace, values, option_string)
        if option_string == '--reset':
            print 'Base reset to: ', values
            Log.history.append(('*' + str(values),
                               time.strftime(STATIC_T, time.gmtime())))
            Log.save_log()
        elif option_string == '--clear':
            Log.history = []
            Log.save_log()
            os.remove(STATIC_P)
            sys.exit('Clear all data...OK')
        else:
            try:
                Log.history.append((dis_dict[option_string] + str(values),
                                    time.strftime(STATIC_T, time.gmtime())))
            except KeyError:
                pass
            else:
                Log.save_log()
            Log.print_log()


class Leave(object):
    """
    This simple tool helps maintaining your holiday leave.
    """
    
    def __init__(self):
        """
        Prepare argparse & pickle.
        """
        
        # create the parser        
        parser = argparse.ArgumentParser(
            description=self.__class__.__doc__,
            argument_default=argparse.SUPPRESS)
        
        # add the arguments
        parser.add_argument('--add', '-a', type=int, dest='add', action=Operate,
                            help='add some free days', default=0)
        parser.add_argument('--remove', '-rm', type=int, dest='remove', action=Operate,
                            help='remove some free days', default=0)
        parser.add_argument('--reset', type=int, dest='reset',
                            action=Operate,
                            help='reset holiday base', default=26)
        parser.add_argument('--show', action=Operate, nargs='?',
                            help='show holiday changelog')
        parser.add_argument('--clear', action=Operate, nargs='?',
                            help='clear all logs')

        # create file | use the existing one
        try:
            Log.history = pickle.load(open('history.p', 'rb'))
        except IOError:
            output = open(STATIC_P, 'wb')
            Log.history = [('*' + \
                           str(int(raw_input('Your holiday base (int): '))),
                           time.strftime(STATIC_T, time.gmtime()))]
            pickle.dump( Log.history, output, protocol=PROTOCOL )
            output.close()
        finally:
            parser.parse_args()
            
if __name__ == '__main__':
    LEAVE = Leave()

2 comments

Andy Barbour 13 years, 8 months ago  # | flag

Nice. argparse is required (not builtin), which I found here: http://code.google.com/p/argparse/

farciarz (author) 13 years, 8 months ago  # | flag

Thx, according to PEP 389 argparse is included in the Python standard library in Python 2.7 and 3.2. It's time to dive in :)