См.также
См.также
1 2 3 4 5 6 7 8 9 10 11 | def id_maker():
index = 0
while True:
yield index
index += 1
gen = id_maker()
print(next(gen))
print(next(gen))
print(next(gen)) |
Запуск:
$ python gen.py
0
1
2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | class CSVFile(object):
def __init__(self, path, sep=','):
self.path = path
self.sep = sep
def __iter__(self):
with open(self.path) as f:
for l in f:
yield l.split(self.sep)
csv_generator = CSVFile('sample.csv')
for row in csv_generator:
print(row) |
1 2 3 | 1997,Ford,E350,"ac, abs, moon",3000.00
1999,Chevy,"Venture ""Extended Edition""","",4900.00
1996,Jeep,Grand Cherokee,"MUST SELL! air, moon roof, loaded",4799.00 |
$ python csv_gen.py
['1997', 'Ford', 'E350', '"ac', ' abs', ' moon"', '3000.00\n']
['1999', 'Chevy', '"Venture ""Extended Edition"""', '""', '4900.00\n']
['1996', 'Jeep', 'Grand Cherokee', '"MUST SELL! air', ' moon roof', ' loaded"', '4799.00\n']
1 2 3 4 5 6 7 8 9 10 11 | function* idMaker(){
var index = 0;
while(true)
yield index++;
}
var gen = idMaker();
console.log(gen.next().value); // 0
console.log(gen.next().value); // 1
console.log(gen.next().value); // 2 |
Запуск:
$ iojs gen.js
0
1
2