<\/span><\/h2>\n\n\n\nimport re
text = \"Hello, World!\"
match = re.search(r\"World\", text)
if match:
print(\"\u627e\u5230\u5566\uff01\")
else:
print(\"\u6ca1\u627e\u5230\u3002\")<\/code><\/pre>\n\n\n\n\u8fd9\u6bb5\u4ee3\u7801\u7b80\u5355\u76f4\u63a5\uff0cr\"World\"<\/code>\u662f\u6211\u4eec\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u544a\u8bc9Python\u6211\u4eec\u8981\u627e\u7684\u662f”World”\u8fd9\u4e2a\u5b57\u7b26\u4e32\u3002re.search()<\/code>\u5728\u6587\u672c\u4e2d\u5bfb\u627e\u5339\u914d\u9879\uff0c\u627e\u5230\u4e86\u5c31\u6253\u5370\u201c\u627e\u5230\u5566\uff01\u201d\u3002<\/p>\n\n\n\n<\/span>2. \u8d2a\u5fc3\u4e0e\u975e\u8d2a\u5fc3\uff1a\u5403\u591a\u4e0e\u9002\u53ef\u800c\u6b62<\/strong><\/span><\/h2>\n\n\n\ntext = \"abracadabra\"
match_greedy = re.search(r\"a.*a\", text)
match_nongreedy = re.search(r\"a.*?a\", text)
print(\"\u8d2a\u5fc3\u6a21\u5f0f:\", match_greedy.group())
print(\"\u975e\u8d2a\u5fc3\u6a21\u5f0f:\", match_nongreedy.group())<\/code><\/pre>\n\n\n\n\u8d2a\u5fc3\u6a21\u5f0f(.*<\/code>)\u4f1a\u5c3d\u53ef\u80fd\u591a\u5730\u5339\u914d\u5b57\u7b26\uff0c\u800c\u975e\u8d2a\u5fc3\u6a21\u5f0f(.*?<\/code>)\u5219\u521a\u597d\u76f8\u53cd\uff0c\u53ea\u5339\u914d\u5230\u80fd\u6ee1\u8db3\u6761\u4ef6\u7684\u6700\u77ed\u5b57\u7b26\u4e32\u3002\u6240\u4ee5\uff0c\u4f60\u4f1a\u770b\u5230\u4e24\u4e2a\u4e0d\u540c\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<\/span>3. \u6570\u5b57\u6355\u83b7\uff1a\u7cbe\u51c6\u5b9a\u4f4d\u6570\u5b57<\/strong><\/span><\/h2>\n\n\n\ntext = \"\u6211\u7684\u7535\u8bdd\u53f7\u7801\u662f123-456-7890\"
phone_num = re.findall(r\"\\d+\", text)
print(\"\u7535\u8bdd\u53f7\u7801:\", phone_num)<\/code><\/pre>\n\n\n\n\\d+<\/code>\u662f\u4e00\u4e2a\u6a21\u5f0f\uff0c\\d<\/code>\u4ee3\u8868\u4efb\u4f55\u6570\u5b57\uff0c\u52a0\u53f7(+<\/code>)\u8868\u793a\u524d\u9762\u7684\u5143\u7d20\u81f3\u5c11\u51fa\u73b0\u4e00\u6b21\uff0c\u8fd9\u91cc\u7528\u6765\u5339\u914d\u8fde\u7eed\u7684\u6570\u5b57\u3002\u7b80\u5355\u4e00\u62db\uff0c\u7535\u8bdd\u53f7\u7801\u5c31\u624b\u5230\u64d2\u6765\u3002<\/p>\n\n\n\n<\/span>4. \u5206\u7ec4\u4e0e\u5f15\u7528\uff1a\u7075\u6d3b\u8fd0\u7528\u5c0f\u62ec\u53f7<\/strong><\/span><\/h2>\n\n\n\ntext = \"John Doe, age 30\"
name, age = re.search(r\"(\\w+) (\\d+)\", text).groups()
print(f\"\u59d3\u540d\uff1a{name}, \u5e74\u9f84\uff1a{age}\")<\/code><\/pre>\n\n\n\n\u5c0f\u62ec\u53f7\u4e0d\u7b80\u5355\uff0c\u5b83\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u5206\u7ec4\uff0c\u6355\u83b7\u5e76\u5b58\u50a8\u5339\u914d\u7684\u6587\u672c\u3002\u4e4b\u540e\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7.groups()<\/code>\u8bbf\u95ee\u8fd9\u4e9b\u6355\u83b7\u7684\u5185\u5bb9\u3002\u662f\u4e0d\u662f\u5f88\u5de7\u5999\uff1f<\/p>\n\n\n\n<\/span>5. \u66ff\u6362\u64cd\u4f5c\uff1a\u6539\u5934\u6362\u9762<\/strong><\/span><\/h2>\n\n\n\ntext = \"Python is fun, Python is life.\"
new_text = re.sub(r\"Python\", \"JavaScript\", text)
print(new_text)<\/code><\/pre>\n\n\n\n\u4f7f\u7528re.sub()<\/code>\uff0c\u4f60\u53ef\u4ee5\u5c06\u6587\u672c\u4e2d\u7684\u67d0\u4e9b\u90e8\u5206\u66ff\u6362\u6389\u3002\u8fd9\u91cc\uff0c\u6211\u4eec\u628a\u6240\u6709\u7684”Python”\u6362\u6210\u4e86”JavaScript”\uff0c\u4f53\u9a8c\u4e00\u4e0b\u8bed\u8a00\u7684\u77ac\u95f4\u8f6c\u6362\u5427\uff01<\/p>\n\n\n\n<\/span>6. \u90ae\u4ef6\u5730\u5740\u9a8c\u8bc1\uff1a\u7cbe\u786e\u6253\u51fb<\/strong><\/span><\/h2>\n\n\n\nemail_pattern = r\"[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+\"
text = \"contact@example.com\"
if re.match(email_pattern, text):
print(\"\u6709\u6548\u7684\u90ae\u7bb1\u5730\u5740\")
else:
print(\"\u90ae\u7bb1\u5730\u5740\u65e0\u6548\")<\/code><\/pre>\n\n\n\n\u8fd9\u4e2a\u6a21\u5f0f\u770b\u8d77\u6765\u590d\u6742\uff0c\u4f46\u5b9e\u9645\u4e0a\u53ea\u662f\u9075\u5faa\u4e86\u90ae\u7bb1\u5730\u5740\u7684\u57fa\u672c\u7ed3\u6784\u3002\u611f\u53f9\u53f7\uff0c\u8fd9\u91cc\u9690\u85cf\u7740\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5f3a\u5927\u903b\u8f91\u80fd\u529b\u3002<\/p>\n\n\n\n