如果要使用正則表達式，請使用re.findall：re.findall('(?<=com/).*$', "www.example.com/thedubaimall")

# ['thedubaimall']

一些速度測試有@DeepSpace的建議：%timeit re.findall('(?<=com/).*$', "www.example.com/thedubaimall")

# The slowest run took 7.57 times longer than the fastest. This could mean that an intermediate result is being cached.

# 1000000 loops, best of 3: 1.29 μs per loop

%timeit re.findall('com/(.*)', "www.example.com/thedubaimall")

# The slowest run took 6.48 times longer than the fastest. This could mean that an intermediate result is being cached.

# 1000000 loops, best of 3: 992 ns per loop

%timeit "www.example.com/thedubaimall".partition(".com/")[2]

# The slowest run took 7.87 times longer than the fastest. This could mean that an intermediate result is being cached.

# 1000000 loops, best of 3: 204 ns per loop

看起來，@DeepSpace的建議快了一點，@Kevin的回答快多了。

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