{"id":517,"date":"2019-07-04T23:24:00","date_gmt":"2019-07-04T15:24:00","guid":{"rendered":"http:\/\/note.systw.net\/note\/?p=517"},"modified":"2023-11-03T23:26:06","modified_gmt":"2023-11-03T15:26:06","slug":"python-string","status":"publish","type":"post","link":"https:\/\/systw.net\/note\/archives\/517","title":{"rendered":"Python string"},"content":{"rendered":"\n

\u5b57\u4e32\u76f8\u52a0<\/strong>
print strvar1 + strvar2<\/p>\n\n\n\n

\u5b57\u4e32\u8f49\u6574\u6578<\/strong>
int( var )<\/p>\n\n\n\n

\u5b57\u4e32\u8f49\u6d6e\u9ede\u6578<\/strong>
float( var )<\/p>\n\n\n\n

\u6578\u5b57\u8f49\u6210\u5b57\u4e32<\/strong>
str( var )
ex:
money=1200
print type(money)
money=str(money)
print type(money)
\u7d50\u679c\u5982\u4e0b
< type ‘int’>
< type ‘str’>
ex:
money=1200
if type(money)==int:
\u3000print \u2018int’
ps:
\u8b8a\u6578\u540d\u7a31\u82e5\u7528str\u6703\u767c\u73fe\u932f\u8aa4, \u5982\u4e0b\u6240\u793a
>>> str=100
>>> str(10)
Traceback (most recent call last):
File “”, line 1, in -toplevel-
str(10)
TypeError: ‘int’ object is not callable<\/p>\n\n\n\n

\u53bb\u9664\u7a7a\u767d<\/strong>
.strip()<\/p>\n\n\n\n

\u5b57\u4e32\u622a\u53d6<\/strong>
str[range]
ex:
str = ‘12345678’
print str[0:1] >> 1 # \u8f38\u51fastr\u4f4d\u7f6e0\u958b\u59cb\u5230\u4f4d\u7f6e1\u4ee5\u524d\u7684\u5b57\u5143
print str[1:6] >> 23456 # \u8f38\u51fastr\u4f4d\u7f6e1\u958b\u59cb\u5230\u4f4d\u7f6e6\u4ee5\u524d\u7684\u5b57\u5143
print str[1:] >> 2345678 # \u8f38\u51fastr\u4f4d\u7f6e1\u958b\u59cb\u5230\u6700\u5f8c\u7684\u5b57\u5143
print str[-5:] >> 45678 # \u8f38\u51fa\u5b57\u4e32\u53f35\u4f4d
print str[-1] >> 8 # \u8f38\u51fa\u5b57\u4e32\u53f31\u4f4d,\u5c31\u662f\u8f38\u51fa\u6700\u5f8c\u4e00\u500b\u5b57\u5143
print str[:-1] >> 1234567 # \u522a\u9664\u6700\u5f8c\u4e00\u500b\u5b57\u5143<\/p>\n\n\n\n

\u66ff\u63db\u5b57\u4e32<\/strong>
\u8b8a\u6578.replace(“\u66ff\u63db\u524d\u5b57\u4e32”\uff0c”\u66ff\u63db\u5f8c\u5b57\u4e32”[,\u6b21\u6578])
\u6b21\u6578:\u7559\u7a7a\uff0c\u8868\u793a\u66ff\u63db\u6240\u6709 
ex:
str = ‘akakak’
str = str.replace(‘k’,’ 8′) # \u5c07\u5b57\u4e32\u88e1\u7684k\u5168\u90e8\u66ff\u63db\u70ba8
print str >> ‘a8a8a8’ # \u8f38\u51fa\u7d50\u679c<\/p>\n\n\n\n

\u627e\u5b57\u4e32<\/strong>
\u8b8a\u6578.find(“\u8981\u67e5\u627e\u7684\u5167\u5bb9”[,\u958b\u59cb\u4f4d\u7f6e,\u7d50\u675f\u4f4d\u7f6e])
\u958b\u59cb\u4f4d\u7f6e\u548c\u7d50\u675f\u4f4d\u7f6e:\u8868\u793a\u8981\u67e5\u627e\u7684\u7bc4\u570d\uff0c\u7a7a\u8868\u793a\u627e\u6240\u6709\u5b57\u4e32\uff0c\u67e5\u5230\u5f8c\u6703\u50b3\u56de\u4f4d\u7f6e\uff0c\u4f4d\u7f6e\u5f9e0\u958b\u59cb\u7b97\uff0c\u5982\u679c\u6c92\u627e\u5230\u5247\u50b3\u56de-1
ex:
str = ‘a,hello’
print str.find(‘hello’) # \u5728\u5b57\u4e32str\u88e1\u67e5\u627e\u5b57\u4e32
\u7d50\u679c\u5982\u4e0b
2<\/p>\n\n\n\n

\u5b57\u5143\u5206\u5272<\/strong>
\u8b8a\u6578.split(“\u5206\u5272\u6a19\u793a\u7b26\u865f”,[count])
count: \u8868\u793a\u5206\u5272\u6700\u5927\u6b21\u6578\uff0c\u7559\u7a7a\u8868\u793a\u5206\u5272\u6240\u6709<\/p>\n\n\n\n

ex:
str = 'a,b,c,d'
strlist = str.split(',')
\u3000for value in strlist:
\u3000\u3000print value
ex:
str='tom n ray n john n'
strlist = str.strip().split(\"n\")
\u3000for value in strlist:
\u3000\u3000print value<\/code><\/pre>\n\n\n\n

list\u5b57\u4e32\u5408\u4f75<\/strong>
.join( < list > )
ex:
listdata = [‘my’,’name’,’is’,’bob’]
col=’ ‘
col.join(listdata)
print col
\u7d50\u679c\u5982\u4e0b
‘my name is bob’<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b57\u4e32\u76f8\u52a0print strvar1 + strvar2 \u5b57\u4e32 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[14],"tags":[],"class_list":["post-517","post","type-post","status-publish","format-standard","hentry","category-develop"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/comments?post=517"}],"version-history":[{"count":0,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/posts\/517\/revisions"}],"wp:attachment":[{"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/media?parent=517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/categories?post=517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/systw.net\/note\/wp-json\/wp\/v2\/tags?post=517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}