正则表达不好\ g逃脱

Question

我有这个Python3正则表达式：

i = "some string wow https://www.amazon.ca/product-product-name"
print(re.match(r'\^https:\/\/www.amazon.[\b"com","ca"](.*)\g', i))

我收到此错误：

sre_constants.error: bad escape \g at position 41

代码应与https://www.amazon.ca/product-product-name匹配。

Answer 1

这里：

i = "some string wow https://www.amazon.ca/product-product-name"
print(re.findall(r'https://www\.amazon\.(?:com|ca)/(?:[^\s]+)', i))

打印：

['https://www.amazon.ca/product-product-name']

Link to interactive demo