{"id":2466,"date":"2025-05-10T17:10:40","date_gmt":"2025-05-10T09:10:40","guid":{"rendered":"https:\/\/thereisno.top\/?p=2466"},"modified":"2025-05-10T17:10:40","modified_gmt":"2025-05-10T09:10:40","slug":"python%e4%b8%adr-b-u-f-%e7%9a%84%e5%90%ab%e4%b9%89%e5%8f%8a%e7%94%a8%e6%b3%95%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/thereisno.top\/?p=2466","title":{"rendered":"Python\u4e2dr’ ‘, b’ ‘, u’ ‘, f’ ‘\u7684\u542b\u4e49\u53ca\u7528\u6cd5\u8be6\u89e3"},"content":{"rendered":"\n

\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u8868\u793a\u6587\u672c\u4fe1\u606f\u3002\u9664\u4e86\u666e\u901a\u7684\u5b57\u7b26\u4e32\uff0cPython\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7279\u6b8a\u7684\u5b57\u7b26\u4e32\u524d\u7f00\u548c\u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/a>\uff0c\u5305\u62ecr’ ‘,b’ ‘,u’ ‘,f’ ‘\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u89e3\u91ca\u8fd9\u4e9b\u524d\u7f00\u7684\u542b\u4e49\u4ee5\u53ca\u5b83\u4eec\u7684\u7528\u6cd5\uff0c\u4ee5\u5e2e\u52a9\u5927\u5bb6\u66f4\u597d\u5730\u7406\u89e3\u548c\u5e94\u7528\u5b83\u4eec\u3002<\/p>\n\n\n\n

\u66f4\u591aPython\u5b66\u4e60\u5185\u5bb9\uff1ahttp:\/\/ipengtao.com<\/a><\/p>\n\n\n\n

r’ ‘: \u539f\u59cb\u5b57\u7b26\u4e32<\/a><\/p>\n\n\n\n

r\u524d\u7f00\u8868\u793a\u539f\u59cb\u5b57\u7b26\u4e32\uff08raw string\uff09\uff0c\u5b83\u4f1a\u53d6\u6d88\u5b57\u7b26\u4e32\u4e2d\u7684\u8f6c\u4e49\u5b57\u7b26\uff08\u5982\\n\u3001\\t\uff09\u7684\u7279\u6b8a\u542b\u4e49\u3002\u539f\u59cb\u5b57\u7b26\u4e32\u9002\u7528\u4e8e\u9700\u8981\u4fdd\u7559\u8f6c\u4e49\u5b57\u7b26\u539f\u59cb\u5f62\u5f0f\u7684\u60c5\u51b5\uff0c\u5982\u6b63\u5219\u8868\u8fbe\u5f0f\u3001\u6587\u4ef6\u8def\u5f84\u7b49\u3002<\/p>\n\n\n\n

1 \u57fa\u672c\u7528\u6cd5<\/p>\n\n\n\n

# \u4f7f\u7528r\u524d\u7f00\u521b\u5efa\u539f\u59cb\u5b57\u7b26\u4e32
path = r’C:\\Users\\Username\\Documents’
print(path)<\/p>\n\n\n\n

\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cr\u524d\u7f00\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u53cd\u659c\u6760\\\u89c6\u4e3a\u666e\u901a\u5b57\u7b26\uff0c\u800c\u4e0d\u662f\u8f6c\u4e49\u5b57\u7b26\u3002<\/p>\n\n\n\n

2 \u4e0e\u8f6c\u4e49\u5b57\u7b26\u7684\u6bd4\u8f83<\/p>\n\n\n\n

# \u666e\u901a\u5b57\u7b26\u4e32\u4e0e\u539f\u59cb\u5b57\u7b26\u4e32\u7684\u6bd4\u8f83
normal_str = ‘C:\\\\Users\\\\Username\\\\Documents’
raw_str = r’C:\\Users\\Username\\Documents’<\/p>\n\n\n\n

print(normal_str == raw_str)  # \u8f93\u51fa True<\/p>\n\n\n\n

\u539f\u59cb\u5b57\u7b26\u4e32\u4e0e\u666e\u901a\u5b57\u7b26\u4e32\u5728\u8868\u793a\u76f8\u540c\u7684\u6587\u672c\u65f6\u662f\u76f8\u7b49\u7684\uff0c\u4f46\u539f\u59cb\u5b57\u7b26\u4e32\u66f4\u5bb9\u6613\u9605\u8bfb\u548c\u7ef4\u62a4\u3002<\/p>\n\n\n\n

b’ ‘: \u5b57\u8282\u5b57\u7b26\u4e32<\/a><\/p>\n\n\n\n

b\u524d\u7f00\u8868\u793a\u5b57\u8282\u5b57\u7b26\u4e32\uff08bytes string\uff09\uff0c\u5b83\u7528\u4e8e\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u800c\u4e0d\u662f\u6587\u672c\u6570\u636e\u3002\u5b57\u8282\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u901a\u5e38\u7528\u4e8e\u5904\u7406\u56fe\u50cf\u3001\u97f3\u9891\u3001\u7f51\u7edc\u534f\u8bae\u7b49\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n\n\n\n

1 \u57fa\u672c\u7528\u6cd5<\/p>\n\n\n\n

# \u4f7f\u7528b\u524d\u7f00\u521b\u5efa\u5b57\u8282\u5b57\u7b26\u4e32
binary_data = b’\\x48\\x65\\x6c\\x6c\\x6f’  # \u5b57\u6bcd ‘Hello’ \u7684\u5b57\u8282\u8868\u793a
print(binary_data)<\/p>\n\n\n\n

\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cb\u524d\u7f00\u8868\u793a\u5b57\u8282\u5b57\u7b26\u4e32\uff0c\u6bcf\u4e2a\\x\u540e\u9762\u8ddf\u7740\u4e24\u4e2a\u5341\u516d\u8fdb\u5236\u6570\u5b57\uff0c\u8868\u793a\u4e00\u4e2a\u5b57\u8282\u3002<\/p>\n\n\n\n

2 \u5b57\u7b26\u4e32\u4e0e\u5b57\u8282\u5b57\u7b26\u4e32\u7684\u533a\u522b<\/p>\n\n\n\n

# \u5b57\u7b26\u4e32\u4e0e\u5b57\u8282\u5b57\u7b26\u4e32\u7684\u533a\u522b
text = ‘Hello’
binary_data = b’Hello’<\/p>\n\n\n\n

print(type(text))  # \u8f93\u51fa <class ‘str’>
print(type(binary_data))  # \u8f93\u51fa <class ‘bytes’><\/p>\n\n\n\n

\u5b57\u7b26\u4e32\u548c\u5b57\u8282\u5b57\u7b26\u4e32\u662f\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5b57\u7b26\u4e32\u7528\u4e8e\u6587\u672c\uff0c\u5b57\u8282\u5b57\u7b26\u4e32\u7528\u4e8e\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n\n\n\n

u’ ‘: Unicode\u5b57\u7b26\u4e32<\/a><\/p>\n\n\n\n

u\u524d\u7f00\u8868\u793aUnicode\u5b57\u7b26\u4e32\uff0c\u5b83\u7528\u4e8e\u5904\u7406Unicode\u7f16\u7801\u7684\u6587\u672c\u6570\u636e\u3002\u5728Python 3\u4e2d\uff0c\u6240\u6709\u7684\u5b57\u7b26\u4e32\u90fd\u662fUnicode\u5b57\u7b26\u4e32\uff0c\u56e0\u6b64\u5f88\u5c11\u9700\u8981\u4f7f\u7528u\u524d\u7f00\u3002\u5728Python 2\u4e2d\uff0cu\u524d\u7f00\u7528\u4e8e\u8868\u793aUnicode\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n

1 \u57fa\u672c\u7528\u6cd5<\/p>\n\n\n\n

# \u4f7f\u7528u\u524d\u7f00\u521b\u5efaUnicode\u5b57\u7b26\u4e32\uff08Python 2\u793a\u4f8b\uff09
unicode_text = u’\u4f60\u597d\uff0c\u4e16\u754c\uff01’
print(unicode_text)<\/p>\n\n\n\n

\u5728Python 3\u4e2d\uff0c\u65e0\u9700\u4f7f\u7528u\u524d\u7f00\uff0c\u666e\u901a\u5b57\u7b26\u4e32\u5373\u4e3aUnicode\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n

2 Unicode\u5b57\u7b26\u4e32\u4e0e\u666e\u901a\u5b57\u7b26\u4e32\u7684\u533a\u522b<\/p>\n\n\n\n

# Unicode\u5b57\u7b26\u4e32\u4e0e\u666e\u901a\u5b57\u7b26\u4e32\u7684\u533a\u522b\uff08Python 2\u793a\u4f8b\uff09
text = ‘Hello’
unicode_text = u’Hello’<\/p>\n\n\n\n

print(type(text))  # \u8f93\u51fa <type ‘str’>
print(type(unicode_text))  # \u8f93\u51fa <type ‘unicode’><\/p>\n\n\n\n

\u5728Python 2\u4e2d\uff0cUnicode\u5b57\u7b26\u4e32\u4e0e\u666e\u901a\u5b57\u7b26\u4e32\u662f\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u533a\u5206\u6587\u672c\u7f16\u7801\u3002<\/p>\n\n\n\n

f’ ‘: \u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/p>\n\n\n\n

f\u524d\u7f00\u8868\u793a\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff08formatted string\uff09\uff0c\u5b83\u7528\u4e8e\u5728\u5b57\u7b26\u4e32\u4e2d\u5d4c\u5165\u8868\u8fbe\u5f0f\u7684\u503c\u3002\u5728\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5927\u62ec\u53f7{}\u6765\u5f15\u7528\u53d8\u91cf\u6216\u8868\u8fbe\u5f0f\uff0c\u5e76\u5c06\u5176\u503c\u63d2\u5165\u5b57\u7b26\u4e32\u4e2d\u3002<\/p>\n\n\n\n

1 \u57fa\u672c\u7528\u6cd5<\/p>\n\n\n\n

# \u4f7f\u7528f\u524d\u7f00\u521b\u5efa\u683c\u5f0f\u5316\u5b57\u7b26\u4e32
name = ‘Alice’
age = 30
greeting = f’Hello, my name is {name} and I am {age} years old.’
print(greeting)<\/p>\n\n\n\n

\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cf\u524d\u7f00\u8868\u793a\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff0c\u5927\u62ec\u53f7{}\u5185\u7684\u8868\u8fbe\u5f0f\u4f1a\u88ab\u8ba1\u7b97\u5e76\u63d2\u5165\u5230\u5b57\u7b26\u4e32\u4e2d\u3002<\/p>\n\n\n\n

2 \u8868\u8fbe\u5f0f\u548c\u53d8\u91cf<\/p>\n\n\n\n

# \u5728\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528\u8868\u8fbe\u5f0f\u548c\u53d8\u91cf
x = 10
y = 20
result = f’The sum of {x} and {y} is {x + y}’
print(result)<\/p>\n\n\n\n

\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u5141\u8bb8\u5d4c\u5165\u8868\u8fbe\u5f0f\u548c\u53d8\u91cf\uff0c\u5e76\u5c06\u5b83\u4eec\u7684\u503c\u52a8\u6001\u63d2\u5165\u5230\u5b57\u7b26\u4e32\u4e2d\u3002<\/p>\n\n\n\n

\u603b\u7ed3<\/p>\n\n\n\n

\u5728Python\u4e2d\uff0cr’ ‘,b’ ‘,u’ ‘,f’ ‘\u7b49\u524d\u7f00\u548c\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u662f\u7528\u4e8e\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u6587\u672c\u548c\u6570\u636e\u7684\u5de5\u5177\u3002r\u524d\u7f00\u8868\u793a\u539f\u59cb\u5b57\u7b26\u4e32\uff0cb\u524d\u7f00\u8868\u793a\u5b57\u8282\u5b57\u7b26\u4e32\uff0cu\u524d\u7f00\u8868\u793aUnicode\u5b57\u7b26\u4e32\uff0cf\u524d\u7f00\u8868\u793a\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3002\u4e86\u89e3\u8fd9\u4e9b\u524d\u7f00\u7684\u542b\u4e49\u548c\u7528\u6cd5\u6709\u52a9\u4e8e\u66f4\u597d\u5730\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5b57\u7b26\u4e32\u548c\u6570\u636e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u6570\u636e\u7c7b\u578b\uff0c\u7528\u4e8e\u8868\u793a\u6587\u672c\u4fe1\u606f\u3002\u9664\u4e86\u666e\u901a\u7684\u5b57\u7b26\u4e32\uff0cPython\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7279\u6b8a … <\/p>\n

\u7ee7\u7eed\u9605\u8bfb\u201cPython\u4e2dr’ ‘, b’ ‘, u’ ‘, f’ ‘\u7684\u542b\u4e49\u53ca\u7528\u6cd5\u8be6\u89e3\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[9],"class_list":["post-2466","post","type-post","status-publish","format-standard","hentry","category-python","tag-python"],"_links":{"self":[{"href":"https:\/\/thereisno.top\/index.php?rest_route=\/wp\/v2\/posts\/2466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thereisno.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thereisno.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thereisno.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thereisno.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2466"}],"version-history":[{"count":1,"href":"https:\/\/thereisno.top\/index.php?rest_route=\/wp\/v2\/posts\/2466\/revisions"}],"predecessor-version":[{"id":2467,"href":"https:\/\/thereisno.top\/index.php?rest_route=\/wp\/v2\/posts\/2466\/revisions\/2467"}],"wp:attachment":[{"href":"https:\/\/thereisno.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thereisno.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thereisno.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}