Das deutsche Python-Forum

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i=1
az_p=8
liste=[]
while i<=az_p:
    y = -1
    x = y*2
    z = y*3
    liste.append ((x,y,z))
    i=i+1
f = open("PUNKTE.txt","w")
liste = map(lambda(x):str(x), liste)
for i in liste:
    f.write(i+"\n")
f.close()

Code: Alles auswählen

WEG = open("PATH.txt","w")
data = open("PUNKTE.txt").read()
WEG.write(re.sub("("," ",data))
WEG.close()

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with open("PUNKTE.txt","w") as f:
    f.write(''.join('%s\t%s\t%s\n'%xyz for xyz in liste))

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''.join(['%s\t%s\t%s\n'%xyz for xyz in liste])

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lst=['%s\t%s\t%s\n'%xyz for xyz in liste]

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gen=('%s\t%s\t%s\n'%xyz for xyz in liste)

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''.join('{0}\t{1}\t{2}\n'.format(*xyz) for xyz in liste)

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#!/usr/bin/env python


def main():
    with open('test.txt', 'w') as points_file:
        points_file.writelines('-1, -2, -3\n' for _ in xrange(8))


if __name__ == '__main__':
    main()

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>>> i for i in range(10)
  File "<stdin>", line 1
    i for i in range(10)
        ^
SyntaxError: invalid syntax

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>>> (i for i in range(10))
<generator object <genexpr> at 0x7f03649f65f0>

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>>> list(i for i in range(10))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

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>>> list((i for i in range(10)))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Code: Alles auswählen

ys = [f(x) for x in xs if p(x)]
# 
# Zucker für:
# 
ys = list()
for x in xs:
    if p(x):
        ys.append(f(x))

# ----

ys = (f(x) for x in xs if p(x))
# 
# Zucker für:
# 
def gf():
    for x in xs:
        if p(x):
            yield f(x)

ys = gf()

# ----

def gf():
    init()
    while True:
        if end_condition():
            break
        yield next_result()
# 
# Zucker für:
# 
class Iterator(object):
    def __init__(self):
        init()
    
    def __iter__(self):
        return self
    
    def next(self):
        if end_condition():
            raise StopIteration
        return next_result()

gf = Iterator()

# ----

with create_context() as c:
    do_something(c)
# 
# Zucker für (vereinfacht):
# 
c = create_context().__enter__()
try:
    do_something(c)
finally:
    c.__exit__()

# ----

lambda x: do_something(x)
# 
# Zucker für:
# 
def temporary_name(x):
    return do_something(x)

# ----

for x in xs:
    do_something(x)
# 
# Zucker für:
# 
xs_iterator = iter(xs)
while True:
    try:
        x = xs_iterator.next()
    except StopIteration:
        break
    do_something(x)

# ----

def f():
    do_something()
# 
# Zucker für:
# 
class F(object):
    def __call__(self):
        do_something()

f = F()