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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()