New Examples

Author: Guilherme Diego

cap1/problem19-1.py

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+from collections import ChainMap
+
+
+values = ChainMap()
+values['x'] = 1
+
+# Adiciona um novo mapeamento
+values = values.new_child()
+values['x'] = 2
+
+# Adiciona um novo mapeamento
+values = values.new_child()
+values['x'] = 3
+
+print(values)
+print(values['x'])
+
+# Descarta o último mapeamento
+values = values.parents
+print(values['x'])
+
+# Descarta o último mapeamento
+values = values.parents
+print(values['x'])
+
+print(values)

cap1/problem19.py

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+import os
+
+nums = [1,2,3,4,5]
+s = sum(x * x for x in nums)
+
+print('SUM')
+print(s)
+
+files = os.listdir('./')
+
+if any(name.endswith('.py') for name in files):
+    print('There be python!')
+else:
+    print('Sorry, no py') 
+
+s = ('ACME', 50, 123.45)
+print(','.join(str(x) for x in s))
+
+portifolio = [
+    {'name': 'GOOG', 'shares': 50}, 
+    {'name': 'YHOO', 'shares': 75},
+    {'name': 'AOL', 'shares': 20},
+    {'name': 'SCOX', 'shares': 65}
+]
+min_shares = min(s['shares'] for s in portifolio)
+print(min_shares)
+
+

cap1/problem20.py

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+from collections import ChainMap
+
+a = {'x': 1, 'z': 3}
+b = {'y': 2, 'z': 4}
+
+c = ChainMap(a, b)
+
+print('< x >', c['x'])
+print('< y > ', c['y'])
+print('< z >: ', c['z'])
+
+print('< Length >', len(c))
+print('< Keys >', list(c.keys()))
+print('< Values >', list(c.values()))
+
+c['z'] = 10
+print('New A', a)

cap2/problem1.py

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+import re
+
+line = 'asdf asd;alfre, michael, viado é    foo'
+
+splited = re.split(r'[;,\s]\s*', line)
+
+print('SPLITED STRING')
+print(splited)
+
+splited_for_remake = re.split(r'(;|,|\s)\s*', line)
+print('SPLITED WITH DELIMITERS')
+print(splited_for_remake)
+
+values = splited_for_remake[::2]
+print('ONLY VALUES')
+print(values)
+
+delimiters = splited_for_remake[1::2] + ['']
+print('ONLY DELIMITERS')
+print(delimiters)
+
+line_again = ''.join(v+d for v,d in zip(values, delimiters))
+print('LINE AGAIN MODAFCK')
+print(line_again)

cap2/problem2.py

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+import os
+
+filenames = os.listdir('../cap1')
+
+print('VERBOSE FILENAMES VARIABLE')
+print(filenames)
+
+txt_files = [filename for filename in filenames if filename.endswith('.txt') ]
+print('TXT FILES')
+print(txt_files)
+
+any_py_on_filename = any(filename.endswith('.py') for filename in filenames)
+print('ANY EXAMPLE')
+print(any_py_on_filename)
+

cap2/problem3.py

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+"""
+    In OSX
+    fnmatch('michael.txt', '*.TXT')
+    >> FALSE
+
+    In windows
+    fnmatch('michael.txt', '*.TXT'))
+    >> TRUE
+
+    FOR THAT FUCKIN SHIT (WINDOW) OF SYSTEM YOU CAN USE FNMATCHCASE HUR DURRRRR
+"""
+from fnmatch import fnmatch, fnmatchcase
+
+print('Everything endswith .txt', fnmatch('michael.txt', '*.txt'))
+
+print('Start with F', fnmatch('foo.txt', '?oo.txt'))
+
+print('Complex Regex', fnmatch('Dat45.csv', 'Dat[0-9]*'))
+
+names = ['Dat1.csv', 'Dat2.csv', 'config.ini', 'foo.py']
+
+print('Filter with Generator', [name for name in names if fnmatch(name, 'Dat*.csv')])
+
+
+#------------------------------------------------------------------------------------
+addresses = [
+    '5412 N CLARK ST',
+    '1060 W ADDISON ST',
+    '1039 W GRANVILLE AVE',
+    '2122 N CLARK ST',
+    '4802 N BROADWAY'
+]
+
+print([addr for addr in addresses if fnmatchcase(addr, '* ST')])
+print([addr for addr in addresses if fnmatchcase(addr, '54[0-9][0-9] *CLARK*')])