update

2022.03.16_frequently_used_python_package/re_example.py

@@ -0,0 +1,23 @@
+import re
+
+# 正则表达式：匹配任意字符（.）；零次或多次（*）；尽可能少地匹配（?）
+
+# re.match 指匹配起始位置的模式，如果起始位置不匹配的话，返回 None
+string = 'this_is_a_test_abc_123'
+result = re.match(pattern='ab(.*?)23', string=string)
+print(result)
+print()
+result = re.match(pattern='this(.*?)abc', string=string)
+print(result.group(0))
+print(result.group(1))
+print()
+
+# re.search 扫描整个字符串并返回第一个成功的匹配。
+string = 'this_is_a_test_abc_123'
+result = re.search(pattern='ab(.*?)23', string=string)
+print(result.group(0))
+print(result.group(1))
+print()
+result = re.search(pattern='this(.*?)abc', string=string)
+print(result.group(0))
+print(result.group(1))