add lec7, 8, 9

Author: uralbash

lec6/__init__.py

@@ -0,0 +1,3 @@
+Имя,Отчество,Фамилия
+Иван,Иванович,Иванов
+Василий,Васильевич,Васильев

lec6/csv_dict_example.csv

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+Имя,Фамилия,Отчество
+Иван,Иванов,Иванович
+Василий,Васильев,Васильевич

lec6/csv_example.csv

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+# coding: utf-8
+
+# Пример работы с CSV файлом
+
+import csv
+from StringIO import StringIO
+
+def main():
+    sample_data = StringIO(
+        'Имя,Фамилия,Отчество\n'
+        'Иван, Иванов, Иванович\n'
+        'Василий, Васильев, Васильевич\n'
+    )
+    sample_obj = [
+        ("Имя", "Фамилия", "Отчество"),
+        ("Иван", "Иванов", "Иванович"),
+        ("Василий", "Васильев", "Васильевич"),
+    ]
+
+    csv_file = open('csv_example.csv','w')
+
+    csv_reader = csv.reader(sample_data)
+    csv_writer = csv.writer(csv_file)
+
+    for row in csv_reader:
+        print '|'.join(row)
+
+    csv_writer.writerows(sample_obj)
+
+    print '=' * 10, 'В виде словаря', '=' * 10
+
+    sample_data.seek(0)
+    csv_reader_dict = csv.DictReader(sample_data)
+
+    for d in csv_reader_dict:
+        print d
+        for k,v in d.items():
+            print "%s: %s" % (k,v)
+
+    sample_dict = [
+        {'Имя': 'Иван',
+         'Фамилия': 'Иванов',
+         'Отчество': 'Иванович'},
+
+        {'Имя': 'Василий',
+         'Фамилия': 'Васильев',
+         'Отчество': 'Васильевич'},
+    ]
+
+    csv_dict_file = open('csv_dict_example.csv', 'w')
+
+    csv_writer_dict = csv.DictWriter(csv_dict_file,
+        sorted(sample_dict[0].keys()))
+
+    csv_writer_dict.writeheader() # python 2.7+
+    csv_writer_dict.writerows(sample_dict)
+
+    csv_dict_file.close()
+    csv_file.close()
+
+if __name__ == "__main__":
+    main()

lec6/csv_example.py

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+# coding: utf-8
+
+# Пример работы с JSON
+
+import json
+
+def _gen_data():
+    import time
+    import hashlib
+    import random
+
+    t = time.time()
+
+    return {
+        'timestamp':  int(t),
+        'payload': hashlib.md5(str(t + random.random())).hexdigest(),
+    }
+
+def main():
+    data = []
+    for i in range(100):
+        data.append(_gen_data())
+
+    print json.dumps(data, indent=1)
+
+    x = '''
+{"widget": {
+    "debug": "on",
+    "window": {
+        "title": "Sample Konfabulator Widget",
+        "name": "main_window",
+        "width": 500,
+        "height": 500
+    },
+    "image": { 
+        "src": "Images/Sun.png",
+        "name": "sun1",
+        "hOffset": 250,
+        "vOffset": 250,
+        "alignment": "center"
+    },
+    "text": {
+        "data": "Click Here",
+        "size": 36,
+        "style": "bold",
+        "name": "text1",
+        "hOffset": 250,
+        "vOffset": 100,
+        "alignment": "center",
+        "onMouseUp": "sun1.opacity = (sun1.opacity / 100) * 90;"
+    }
+}}  
+    '''
+
+    d = json.loads(x)
+
+    print d['widget']['image']['src']
+
+if __name__ == "__main__":
+    main()

lec6/json_example.py

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+# coding: utf-8
+
+# Чтение данных из pickle
+
+import cPickle as pickle
+
+from pickle_example_write import State
+
+def main():
+    obj = None
+    pickled_obj = ''
+    with open('pickle_example.pickle') as f:
+        pickled_obj = f.read()
+
+    obj = pickle.loads(pickled_obj)
+
+    print type(obj)
+    print obj.get_initials()
+
+
+if __name__ == "__main__":
+    main()

lec6/pickle_example_read.py

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+# coding: utf-8
+
+# Запись обекта в pickle
+
+import cPickle as  pickle
+
+class State(object):
+    def __init__(self, first_name,
+                       third_name,
+                       second_name=''):
+        self.first_name = first_name.decode('utf-8')
+        self.second_name = second_name.decode('utf-8')
+        self.third_name = third_name.decode('utf-8')
+
+    def get_initials(self):
+        tn = self.third_name.lower().capitalize()
+        fn = self.first_name[0].capitalize()
+        if self.second_name:
+            sn = self.second_name[0].capitalize()
+        else:
+            sn = ''
+        return "%s%s%s" % (tn, fn, sn)
+
+def main():
+    s = State("Иван", "Иванов", "Иванович")
+    print s.get_initials()
+    pickled_data = pickle.dumps(s)
+    with open('pickle_example.pickle', 'w') as f:
+        f.write(pickled_data)
+
+if __name__ == "__main__":
+    main()

lec6/pickle_example_write.py

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+# coding: utf-8
+
+# Использование модуля shelve для хранения данных
+
+import shelve
+import random
+
+def main():
+    db = shelve.open('example_db.shlv')
+    print db.keys()
+    print db.values()
+
+    for i in range(5):
+        db[str(random.random())] = 'test shelve'
+
+if __name__ == "__main__":
+    main()

lec6/shelve_example.py

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+# coding: utf-8
+
+import sqlite3
+
+def main():
+    con = sqlite3.connect('db.sqlite3')
+
+    c = con.cursor()
+
+    c.execute('''create table stocks (
+                    date text,
+                    trans text,
+                    symbol text,
+                    qty real,
+                    price real)''')
+
+    for t in [('2006-03-28', 'BUY', 'IBM', 1000, 45.00),
+              ('2006-04-05', 'BUY', 'MSOFT', 1000, 72.00),
+              ('2006-04-06', 'SELL', 'IBM', 500, 53.00),
+             ]:
+        c.execute('insert into stocks values (?,?,?,?,?)', t)
+
+    c.execute('select * from stocks where symbol=? order by price', ('IBM',))
+    for row in c:
+        print row
+
+    c.execute('select sum(price) as summ from stocks')
+    for row in c:
+        print row
+
+
+if __name__ == "__main__":
+    main()

lec6/sqlite3_example.py

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+# coding: utf-8
+
+import ConfigParser
+
+def main():
+    conf = ConfigParser.ConfigParser()
+    conf.read('test.conf')
+
+    if conf.has_section('main'):
+        print conf.getint('main', 'log_size')
+
+if __name__ == "__main__":
+    main()