pocketpy/tests/45_yield.py
2023-09-07 00:35:47 +08:00

67 lines
967 B
Python

def f(n):
for i in range(n):
yield i
x = 0
for j in f(5):
x += j
assert x == 10
a = [i for i in f(6)]
assert a == [0,1,2,3,4,5]
def f(n):
for i in range(n):
for j in range(n):
yield i, j
a = [i for i in f(3)]
assert len(a) == 9
assert a[0] == (0,0)
assert a[1] == (0,1)
assert a[2] == (0,2)
assert a[3] == (1,0)
assert a[4] == (1,1)
assert a[5] == (1,2)
assert a[6] == (2,0)
assert a[7] == (2,1)
assert a[8] == (2,2)
def g():
yield from [1, 2, 3]
def f():
yield from g()
a = [i for i in f()]
assert a == [1, 2, 3]
def f(n):
for i in range(n):
yield i
for j in range(i):
yield j
t = f(3)
assert list(t) == [0, 1, 0, 2, 0, 1]
def f(n):
for i in range(n):
if i == n-1:
raise ValueError
yield i
t = f(3)
t = iter(t)
assert next(t) == 0
assert next(t) == 1
try:
next(t)
exit(1)
except ValueError:
pass
assert next(t) == StopIteration