![\"python\u5982\u4f55\u5224\u65ad\u82f1\u6587\u5b57\u7b26\u65b9\u6cd5\"](\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/4d93ce48-969b-4ea3-be05-ce2f4f97293c.webp?x-oss-process=image\/auto-orient,1\/format,webp\")
<\/p>\n<\/p>\n
Python\u5224\u65ad\u82f1\u6587\u5b57\u7b26\u7684\u65b9\u6cd5<\/strong>\u6709\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5757\u3001\u4f7f\u7528unicodedata\u6a21\u5757\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5728\u4e0d\u540c\u7684\u60c5\u51b5\u4e0b\u6709\u4e0d\u540c\u7684\u4f18\u52a3\uff0c\u5177\u4f53\u7684\u4f7f\u7528\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u6765\u9009\u62e9\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e09\u79cd\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u76f8\u5173\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<\/p>\n \u4e00\u3001\u5b57\u7b26\u4e32\u65b9\u6cd5<\/p>\n<\/p>\n Python\u4e2d\u7684\u5b57\u7b26\u4e32\u65b9\u6cd5\u975e\u5e38\u5f3a\u5927\uff0c\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u82f1\u6587\u5b57\u7b26\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f return char.isalpha()<\/p>\n print(is_english_char_alpha('a')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_alpha('A')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_alpha('1')) # \u8f93\u51fa: False<\/p>\n print(is_english_char_alpha('$')) # \u8f93\u51fa: False<\/p>\n <\/code><\/pre>\n<\/p>\n return char.isascii() and char.isalpha()<\/p>\n print(is_english_char_ascii('a')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_ascii('A')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_ascii('1')) # \u8f93\u51fa: False<\/p>\n print(is_english_char_ascii('$')) # \u8f93\u51fa: False<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e8c\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5757<\/p>\n<\/p>\n \u4f7f\u7528Python\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5757 \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5339\u914d\u5355\u4e2a\u82f1\u6587\u5b57\u7b26\u3002<\/p>\n<\/p>\n def is_english_char_regex(char):<\/p>\n return re.match(r'^[A-Za-z]$', char) is not None<\/p>\n print(is_english_char_regex('a')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_regex('A')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_regex('1')) # \u8f93\u51fa: False<\/p>\n print(is_english_char_regex('$')) # \u8f93\u51fa: False<\/p>\n <\/code><\/pre>\n<\/p>\n \u5982\u679c\u9700\u8981\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5305\u542b\u82f1\u6587\u5b57\u7b26\uff0c\u53ef\u4ee5\u4f7f\u7528 return re.findall(r'[A-Za-z]', s)<\/p>\n print(find_english_chars_in_string('Hello, World! 123')) # \u8f93\u51fa: ['H', 'e', 'l', 'l', 'o', 'W', 'o', 'r', 'l', 'd']<\/p>\n <\/code><\/pre>\n<\/p>\n \u4e09\u3001\u4f7f\u7528unicodedata\u6a21\u5757<\/p>\n<\/p>\n \u53ef\u4ee5\u4f7f\u7528 def is_english_char_unicode(char):<\/p>\n try:<\/p>\n return 'LATIN' in unicodedata.name(char)<\/p>\n except ValueError:<\/p>\n return False<\/p>\n print(is_english_char_unicode('a')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_unicode('A')) # \u8f93\u51fa: True<\/p>\n print(is_english_char_unicode('1')) # \u8f93\u51fa: False<\/p>\n print(is_english_char_unicode('$')) # \u8f93\u51fa: False<\/p>\n <\/code><\/pre>\n<\/p>\n \u53ef\u4ee5\u5bf9\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u8fdb\u884c\u5224\u65ad\uff0c\u7b5b\u9009\u51fa\u82f1\u6587\u5b57\u7b26\u3002<\/p>\n<\/p>\n return [char for char in s if is_english_char_unicode(char)]<\/p>\n print(find_english_chars_in_string_unicode('Hello, World! 123')) # \u8f93\u51fa: ['H', 'e', 'l', 'l', 'o', 'W', 'o', 'r', 'l', 'd']<\/p>\n <\/code><\/pre>\n<\/p>\n \u56db\u3001\u6027\u80fd\u5bf9\u6bd4<\/p>\n<\/p>\n \u4e0d\u540c\u7684\u65b9\u6cd5\u5728\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u4e0b\u6709\u4e0d\u540c\u7684\u6027\u80fd\u8868\u73b0\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u5b57\u7b26\u4e32\u65b9\u6cd5\u7684\u6027\u80fd\u8f83\u597d\uff0c\u9002\u5408\u5904\u7406\u7b80\u5355\u7684\u5224\u65ad\u3002\u800c\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\u66f4\u4e3a\u7075\u6d3b\uff0c\u4f46\u6027\u80fd\u7a0d\u5dee\u3002\u4f7f\u7528 \u53ef\u4ee5\u901a\u8fc7 def test_isalpha():<\/p>\n for char in 'Hello, World! 123':<\/p>\n is_english_char_alpha(char)<\/p>\n def test_isascii():<\/p>\n for char in 'Hello, World! 123':<\/p>\n is_english_char_ascii(char)<\/p>\n def test_regex():<\/p>\n for char in 'Hello, World! 123':<\/p>\n is_english_char_regex(char)<\/p>\n def test_unicode():<\/p>\n for char in 'Hello, World! 123':<\/p>\n is_english_char_unicode(char)<\/p>\n print('isalpha:', timeit.timeit(test_isalpha, number=10000))<\/p>\n print('isascii:', timeit.timeit(test_isascii, number=10000))<\/p>\n print('regex:', timeit.timeit(test_regex, number=10000))<\/p>\n print('unicode:', timeit.timeit(test_unicode, number=10000))<\/p>\n <\/code><\/pre>\n<\/p>\n \u901a\u8fc7\u6d4b\u8bd5\uff0c\u53ef\u4ee5\u53d1\u73b0\u5b57\u7b26\u4e32\u65b9\u6cd5\u7684\u6027\u80fd\u901a\u5e38\u6700\u597d\uff0c\u5176\u6b21\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\uff0c\u6700\u540e\u662f \u4e94\u3001\u5e94\u7528\u573a\u666f<\/p>\n<\/p>\n \u4e0d\u540c\u7684\u65b9\u6cd5\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u3002\u4e0b\u9762\u5217\u4e3e\u4e00\u4e9b\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f\u53ca\u63a8\u8350\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n \u5728\u7528\u6237\u8f93\u5165\u9a8c\u8bc1\u4e2d\uff0c\u901a\u5e38\u9700\u8981\u5224\u65ad\u8f93\u5165\u662f\u5426\u4e3a\u82f1\u6587\u5b57\u7b26\u3002\u8fd9\u65f6\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u4e2d\u7684 if all(char.isalpha() for char in user_input):<\/p>\n print("\u8f93\u5165\u6709\u6548")<\/p>\n else:<\/p>\n print("\u8f93\u5165\u65e0\u6548")<\/p>\n validate_user_input('HelloWorld') # \u8f93\u51fa: \u8f93\u5165\u6709\u6548<\/p>\n validate_user_input('Hello123') # \u8f93\u51fa: \u8f93\u5165\u65e0\u6548<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u5904\u7406\u6587\u672c\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u63d0\u53d6\u82f1\u6587\u5b57\u7b26\u6216\u8fc7\u6ee4\u6389\u975e\u82f1\u6587\u5b57\u7b26\u3002\u8fd9\u65f6\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\u3002<\/p>\n<\/p>\n return ''.join(re.findall(r'[A-Za-z]', text))<\/p>\n print(extract_english_chars('Hello, World! 123')) # \u8f93\u51fa: HelloWorld<\/p>\n <\/code><\/pre>\n<\/p>\n \u5728\u5904\u7406\u5305\u542bUnicode\u5b57\u7b26\u7684\u6587\u672c\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u5224\u65ad\u5b57\u7b26\u7684\u7c7b\u522b\u3002\u8fd9\u65f6\u53ef\u4ee5\u4f7f\u7528 return ''.join(char for char in text if 'LATIN' in unicodedata.name(char, ''))<\/p>\n print(extract_latin_chars('Hello, \u4e16\u754c! 123')) # \u8f93\u51fa: Hello<\/p>\n <\/code><\/pre>\n<\/p>\n \u516d\u3001\u7efc\u5408\u793a\u4f8b<\/p>\n<\/p>\n \u4e0b\u9762\u662f\u4e00\u4e2a\u7efc\u5408\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u7ed3\u5408\u4f7f\u7528\u4e0a\u8ff0\u65b9\u6cd5\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u6587\u672c\u6570\u636e\u3002<\/p>\n<\/p>\n import unicodedata<\/p>\n def is_english_char(char):<\/p>\n return char.isalpha() and char.isascii()<\/p>\n def extract_english_chars(text):<\/p>\n return ''.join(re.findall(r'[A-Za-z]', text))<\/p>\n def extract_latin_chars(text):<\/p>\n return ''.join(char for char in text if 'LATIN' in unicodedata.name(char, ''))<\/p>\n def process_text(text):<\/p>\n english_chars = extract_english_chars(text)<\/p>\n latin_chars = extract_latin_chars(text)<\/p>\n print(f"\u539f\u59cb\u6587\u672c: {text}")<\/p>\n print(f"\u63d0\u53d6\u7684\u82f1\u6587\u5b57\u7b26: {english_chars}")<\/p>\n print(f"\u63d0\u53d6\u7684\u62c9\u4e01\u5b57\u7b26: {latin_chars}")<\/p>\n process_text('Hello, \u4e16\u754c! 123') <\/p>\n <\/code><\/pre>\n<\/p>\n \u901a\u8fc7\u4ee5\u4e0a\u5185\u5bb9\uff0c\u6211\u4eec\u8be6\u7ec6\u4ecb\u7ecd\u4e86Python\u5224\u65ad\u82f1\u6587\u5b57\u7b26\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5\u548c \u5982\u4f55\u5728Python\u4e2d\u68c0\u67e5\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4ec5\u5305\u542b\u82f1\u6587\u5b57\u7b26\uff1f<\/strong> Python\u4e2d\u662f\u5426\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u82f1\u6587\uff1f<\/strong> \u5728Python\u4e2d\u5982\u4f55\u5904\u7406\u5305\u542b\u82f1\u6587\u548c\u975e\u82f1\u6587\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\uff1f<\/strong> \u8fd9\u6837\u53ef\u4ee5\u6709\u6548\u5730\u4ece\u539f\u5b57\u7b26\u4e32\u4e2d\u5254\u9664\u975e\u82f1\u6587\u5b57\u7b26\uff0c\u5e76\u4fdd\u7559\u7eaf\u82f1\u6587\u5185\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u5224\u65ad\u82f1\u6587\u5b57\u7b26\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5757\u3001\u4f7f\u7528unicodedata\u6a21\u5757\u3002\u8fd9\u4e9b\u65b9\u6cd5 […]","protected":false},"author":3,"featured_media":1048618,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1048610"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1048610"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1048610\/revisions"}],"predecessor-version":[{"id":1048619,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1048610\/revisions\/1048619"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1048618"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1048610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1048610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1048610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}isalpha()<\/code>\u548cisascii()<\/code>\u3002<\/p>\n<\/p>\n\u4f7f\u7528
isalpha()<\/code><\/h3>\n<\/p>\nisalpha()<\/code>\u65b9\u6cd5\u8fd4\u56deTrue\uff0c\u5982\u679c\u6240\u6709\u5b57\u7b26\u90fd\u662f\u5b57\u6bcd\uff08\u65e0\u8bba\u662f\u5927\u5199\u8fd8\u662f\u5c0f\u5199\uff09\uff0c\u5426\u5219\u8fd4\u56deFalse\u3002<\/p>\n<\/p>\ndef is_english_char_alpha(char):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
\u4f7f\u7528
isascii()<\/code><\/h3>\n<\/p>\nisascii()<\/code>\u65b9\u6cd5\u8fd4\u56deTrue\uff0c\u5982\u679c\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u90fd\u662fASCII\u5b57\u7b26\uff0c\u5426\u5219\u8fd4\u56deFalse\u3002ASCII\u5b57\u7b26\u5305\u62ec\u6240\u6709\u82f1\u6587\u5b57\u7b26\u3001\u6570\u5b57\u548c\u4e00\u4e9b\u7279\u6b8a\u7b26\u53f7\u3002<\/p>\n<\/p>\ndef is_english_char_ascii(char):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
re<\/code>\uff0c\u53ef\u4ee5\u66f4\u7075\u6d3b\u5730\u5224\u65ad\u82f1\u6587\u5b57\u7b26\u3002\u901a\u8fc7\u6b63\u5219\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5339\u914d\u7279\u5b9a\u7684\u6a21\u5f0f\uff0c\u4ee5\u786e\u5b9a\u5b57\u7b26\u662f\u5426\u4e3a\u82f1\u6587\u5b57\u7b26\u3002<\/p>\n<\/p>\n\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n
import re<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
\u5339\u914d\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u82f1\u6587\u5b57\u7b26<\/h3>\n<\/p>\n
findall()<\/code>\u65b9\u6cd5\u3002<\/p>\n<\/p>\ndef find_english_chars_in_string(s):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
unicodedata<\/code>\u6a21\u5757\u63d0\u4f9b\u4e86Unicode\u5b57\u7b26\u6570\u636e\u5e93\u7684\u8bbf\u95ee\u63a5\u53e3\uff0c\u53ef\u4ee5\u7528\u6765\u5224\u65ad\u5b57\u7b26\u7684\u7c7b\u522b\u3002<\/p>\n<\/p>\n\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u82f1\u6587\u5b57\u7b26<\/h3>\n<\/p>\n
unicodedata<\/code>\u6a21\u5757\u6765\u5224\u65ad\u5b57\u7b26\u662f\u5426\u4e3a\u62c9\u4e01\u5b57\u6bcd\uff08\u5373\u82f1\u6587\u5b57\u7b26\uff09\u3002<\/p>\n<\/p>\nimport unicodedata<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u7684\u6240\u6709\u82f1\u6587\u5b57\u7b26<\/h3>\n<\/p>\n
def find_english_chars_in_string_unicode(s):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
unicodedata<\/code>\u6a21\u5757\u7684\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u5224\u65ad\u5b57\u7b26\u7c7b\u522b\u7684\u573a\u666f\uff0c\u4f46\u6027\u80fd\u53ef\u80fd\u4e0d\u5982\u524d\u4e24\u8005\u3002<\/p>\n<\/p>\n\u6027\u80fd\u6d4b\u8bd5<\/h3>\n<\/p>\n
timeit<\/code>\u6a21\u5757\u6765\u6d4b\u8bd5\u4e0d\u540c\u65b9\u6cd5\u7684\u6027\u80fd\u3002<\/p>\n<\/p>\nimport timeit<\/p>\n\u5b57\u7b26\u4e32\u65b9\u6cd5<\/strong><\/h2>\n
\u6b63\u5219\u8868\u8fbe\u5f0f\u65b9\u6cd5<\/strong><\/h2>\n
unicodedata\u65b9\u6cd5<\/strong><\/h2>\n
\u6d4b\u8bd5\u6027\u80fd<\/strong><\/h2>\n
unicodedata<\/code>\u65b9\u6cd5\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n\u9a8c\u8bc1\u7528\u6237\u8f93\u5165<\/h3>\n<\/p>\n
isalpha()<\/code>\u6216isascii()<\/code>\u3002<\/p>\n<\/p>\ndef validate_user_input(user_input):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
\u5904\u7406\u6587\u672c\u6570\u636e<\/h3>\n<\/p>\n
def extract_english_chars(text):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
\u5904\u7406Unicode\u5b57\u7b26<\/h3>\n<\/p>\n
unicodedata<\/code>\u6a21\u5757\u3002<\/p>\n<\/p>\ndef extract_latin_chars(text):<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
import re<\/p>\n\u793a\u4f8b<\/strong><\/h2>\n
\u8f93\u51fa:<\/strong><\/h2>\n
\u539f\u59cb\u6587\u672c: Hello, \u4e16\u754c! 123<\/strong><\/h2>\n
\u63d0\u53d6\u7684\u82f1\u6587\u5b57\u7b26: Hello<\/strong><\/h2>\n
\u63d0\u53d6\u7684\u62c9\u4e01\u5b57\u7b26: Hello<\/strong><\/h2>\n
unicodedata<\/code>\u65b9\u6cd5\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u7f3a\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u6cd5\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u63d0\u4f9b\u4e86\u6027\u80fd\u6d4b\u8bd5\u548c\u5e94\u7528\u573a\u666f\u793a\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u8fd9\u4e9b\u65b9\u6cd5\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff0c\u80fd\u591f\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u6709\u6548\u5730\u5224\u65ad\u548c\u5904\u7406\u82f1\u6587\u5b57\u7b26\u3002<\/p>\n<\/p>\n\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u8981\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4ec5\u5305\u542b\u82f1\u6587\u5b57\u7b26\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684isalpha()<\/code>\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u4f1a\u68c0\u67e5\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u662f\u5426\u4e3a\u5b57\u6bcd\u3002\u5982\u679c\u5b57\u7b26\u4e32\u4e2d\u6709\u4efb\u4f55\u975e\u5b57\u6bcd\u5b57\u7b26\uff0cisalpha()<\/code>\u5c06\u8fd4\u56deFalse<\/code>\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a <\/p>\ntext = "HelloWorld"\nif text.isalpha():\n print("\u5b57\u7b26\u4e32\u4ec5\u5305\u542b\u82f1\u6587\u5b57\u7b26")\nelse:\n print("\u5b57\u7b26\u4e32\u5305\u542b\u975e\u82f1\u6587\u5b57\u7b26")\n<\/code><\/pre>\n
\u9664\u4e86\u4f7f\u7528isalpha()<\/code>\u65b9\u6cd5\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4ec5\u7531\u82f1\u6587\u5b57\u7b26\u7ec4\u6210\u3002\u901a\u8fc7re<\/code>\u6a21\u5757\uff0c\u53ef\u4ee5\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a <\/p>\nimport re\n\ntext = "HelloWorld"\nif re.fullmatch(r'[A-Za-z]+', text):\n print("\u5b57\u7b26\u4e32\u4ec5\u5305\u542b\u82f1\u6587\u5b57\u7b26")\nelse:\n print("\u5b57\u7b26\u4e32\u5305\u542b\u975e\u82f1\u6587\u5b57\u7b26")\n<\/code><\/pre>\n
\u5904\u7406\u5305\u542b\u82f1\u6587\u548c\u975e\u82f1\u6587\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528filter()<\/code>\u51fd\u6570\u914d\u5408str.isalpha()<\/code>\u65b9\u6cd5\u6765\u63d0\u53d6\u82f1\u6587\u5b57\u7b26\u3002\u4f8b\u5982\uff1a <\/p>\ntext = "Hello123!@#"\nenglish_chars = ''.join(filter(str.isalpha, text))\nprint("\u63d0\u53d6\u51fa\u7684\u82f1\u6587\u5b57\u7b26:", english_chars)\n<\/code><\/pre>\n