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Commit 20dfb4b

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adicionando novos exemplos
1 parent 448c615 commit 20dfb4b

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from make_db_file import loadDatabase
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db = loadDatabase()
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for key in db:
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print(key, '=>', db[key])
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print()
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print(db['sue']['name'])
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import pickle
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dbfile = open('people-pickle', 'rb') # uso mode binario de arquivos em py3...
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db = pickle.load(dbfile)
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for key in db:
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print(key, '->\n', db[key])
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print(db['sue']['name'])
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bob = {'name': 'bob smith', 'age': 42, 'pay': 30000, 'job': 'dev'}
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sue = {'name': 'sue jones', 'age': 45, 'pay': 40000, 'job': 'hdw'}
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tom = {'name': 'tom', 'age': 50, 'pay': 0, 'job': None}
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# datebase
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db = {}
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db['bob'] = bob
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db['sue'] = sue
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db['tom'] = tom
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if __name__ == '__main__':
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for key in db:
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print(' ', key, '=>\n\t', db[key])
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dbFileName = 'people-file'
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ENDDB = 'enddb'
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ENDREC = 'endrec'
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RECSEP = '=>'
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def storeDatabase(db, dbFileName = dbFileName):
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dbfile = open(dbFileName, 'w')
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for key in db:
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print(key, file=dbfile)
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for (name, value) in db[key].items():
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print(name + RECSEP + repr(value), file=dbfile)
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print(ENDREC, file=dbfile)
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print(ENDDB, file=dbfile)
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dbfile.close()
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def loadDatabase(dbFileName=dbFileName):
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dbfile = open(dbFileName)
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import sys
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sys.stdin = dbfile
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db = {}
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key = input()
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while key != ENDDB:
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rec = {}
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field = input()
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while field != ENDREC:
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name, value = field.split(RECSEP)
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rec[name] = eval(value)
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field = input()
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db[key] = rec
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key = input()
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return db
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if __name__ == '__main__':
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from initdata import db
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storeDatabase(db)
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from initdata import db
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import pickle
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dbfile = open('people-pickle', 'wb')
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pickle.dump(db, dbfile)
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dbfile.close()

‎1-chapter-aSneakPreview/2-step2-storingRecordsPersistently/2-usingPickleFiles/people-file

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‎1-chapter-aSneakPreview/2-step2-storingRecordsPersistently/2-usingPickleFiles/people-pickle

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from make_db_file import loadDatabase, storeDatabase
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db = loadDatabase()
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db['sue']['pay'] *= 1.10
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db['tom']['name'] = 'tom tolis'
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storeDatabase(db)
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import pickle
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dbfile = open('people-pickle', 'rb')
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db = pickle.load(dbfile)
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dbfile.close()
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db['sue']['pay'] *= 1.10
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db['tom']['name'] = 'tolis'
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dbfile = open('people-pickle', 'wb')
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pickle.dumb(db, dbfile)
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dbfile.close()

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