{"id":19,"date":"2022-08-23T07:32:47","date_gmt":"2022-08-23T07:32:47","guid":{"rendered":"https:\/\/python.freelinuxtutorials.com\/?p=19"},"modified":"2022-08-24T08:25:49","modified_gmt":"2022-08-24T08:25:49","slug":"python-strings-indexing-and-slicing","status":"publish","type":"post","link":"https:\/\/python.freelinuxtutorials.com\/index.php\/2022\/08\/23\/python-strings-indexing-and-slicing\/","title":{"rendered":"Python>>Strings: Indexing and Slicing"},"content":{"rendered":"

I will be showing more examples of indexing and slicing as a form of my practice to familiarize this. From the previous lesson\/posts, the syntax for slicing as follows:<\/p>\n

string[start : end : step]<\/p><\/blockquote>\n

Example1: (Indexing and Slicing in Strings)<\/p>\n\n\n\n\n\n
W<\/td>\nr<\/td>\ni<\/td>\nt<\/td>\ne<\/td>\nC<\/td>\no<\/td>\nd<\/td>\ne<\/td>\nO<\/td>\nn<\/td>\nl<\/td>\ni<\/td>\nn<\/td>\ne<\/td>\n<\/tr>\n
0<\/td>\n1<\/td>\n2<\/td>\n3<\/td>\n4<\/td>\n5<\/td>\n6<\/td>\n7<\/td>\n8<\/td>\n9<\/td>\n10<\/td>\n11<\/td>\n12<\/td>\n13<\/td>\n14<\/td>\n<\/tr>\n
-15<\/td>\n-14<\/td>\n-13<\/td>\n-12<\/td>\n-11<\/td>\n-10<\/td>\n-9<\/td>\n-8<\/td>\n-7<\/td>\n-6<\/td>\n-5<\/td>\n-4<\/td>\n-3<\/td>\n-2<\/td>\n-1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

-print the word “Online”<\/p>\n

>> str=’WriteCodeOnline’
\n>>> print(str)
\nWriteCodeOnline
\n>>> print(str[9:])
\nOnline<\/p><\/blockquote>\n

-print the word “Onli”<\/p>\n

>> print(str[9:13])
\nOnli
\n>>><\/p><\/blockquote>\n

-print the word “teCo”<\/p>\n

>>> print(str[3:7])
\nteCo<\/p><\/blockquote>\n

-print the word “Online” using the negative indexing<\/p>\n

print(str[-6:])
\nOnline<\/p><\/blockquote>\n

-print the word “Onli” using negative indexing<\/p>\n

>>> print(str[-6:-2])
\nOnli<\/p><\/blockquote>\n

-print the word “teCo” using negative indexing<\/p>\n

>> print(str[-12:-8])
\nteCo<\/p><\/blockquote>\n

Example2: (Indexing and Slicing in Lists)<\/p>\n\n\n\n\n\n
Write<\/td>\nCode<\/td>\nOnline<\/td>\n<\/tr>\n
0<\/td>\n1<\/td>\n2<\/td>\n<\/tr>\n
-3<\/td>\n-2<\/td>\n-1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Indexing:<\/p>\n

strlist = [‘Write’, ‘Code’, ‘Online’]
\n>>> print(strlist)
\n[‘Write’, ‘Code’, ‘Online’]
\n>>> print(strlist[0])
\nWrite
\n>>> print(strlist[2])
\nOnline
\n>>> print(strlist[-2])
\nCode<\/p><\/blockquote>\n

>> print(strlist[-2:-1])
\n[‘Code’]<\/p><\/blockquote>\n

Example3: Steps(Stride)<\/p>\n

The “step” parameter is optional and the default is 1. It can be either positive or negative.<\/p>\n

As mentioned about, just want to repeat again<\/p>\n

string[start : end : step]<\/p>\n

start-position end-position increment<\/p>\n

e.g.
\nWRITECODE<\/p>\n

Let say we want to specify the step of slicing by 2<\/p>\n

[start:stop:2]<\/p>\n

>> str = ‘WRITECODE’
\n>>> print(str)
\nWRITECODE
\n>>> print(str[::])
\nWRITECODE
\n>>> print(str[::1])
\nWRITECODE
\n>>> print(str[::2])<\/strong>
\nWIEOE<\/strong><\/p><\/blockquote>\n

 <\/p>\n

Let take this example:<\/p>\n

>> print(str[1:8:3])
\nRED<\/p><\/blockquote>\n

str[1:8:3] = W\u00a0 R\u00a0 \u00a0I\u00a0 \u00a0T\u00a0 E\u00a0 C\u00a0 O\u00a0 D\u00a0 E<\/p>\n

0\u00a0 \u00a01<\/strong>\u00a0 2\u00a0 \u00a03\u00a0 4\u00a0 5\u00a0 6\u00a0 7\u00a0 \u00a08<\/p>\n

-starts\u00a0 from R and ends on D, as (E will not include)<\/p>\n

-steps will start counting from R, take R, then count 0,1,2,3 then take that character, from E count again 0,1,2,3 and take that character<\/p>\n

More example<\/p>\n

-Display letter “t” in one line for word “Writecode”<\/p>\n

>> ‘Writecode'[3:4]
\n‘t’<\/p><\/blockquote>\n

 <\/p>\n

More indexing and slicing on next post<\/p>\n","protected":false},"excerpt":{"rendered":"

I will be showing more examples of indexing and slicing as a form of my practice to familiarize this. From the previous lesson\/posts, the syntax for slicing as follows: string[start : end : step] Example1: (Indexing and Slicing in Strings) W r i t e C o d e O n l i n e…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[3],"tags":[4,7,8,6],"class_list":["post-19","post","type-post","status-publish","format-standard","hentry","category-data-types","tag-data-type","tag-indexing","tag-slicing","tag-strings"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts\/19","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/comments?post=19"}],"version-history":[{"count":3,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts\/19\/revisions"}],"predecessor-version":[{"id":37,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts\/19\/revisions\/37"}],"wp:attachment":[{"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/media?parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/categories?post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/tags?post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}