{"id":56,"date":"2022-08-31T13:09:13","date_gmt":"2022-08-31T13:09:13","guid":{"rendered":"https:\/\/python.freelinuxtutorials.com\/?p=56"},"modified":"2022-08-31T13:10:21","modified_gmt":"2022-08-31T13:10:21","slug":"string-interpolation-and-formatting","status":"publish","type":"post","link":"https:\/\/python.freelinuxtutorials.com\/index.php\/2022\/08\/31\/string-interpolation-and-formatting\/","title":{"rendered":"Python>>String Interpolation and Formatting"},"content":{"rendered":"

String Interpolation is a process substituting values of variables into placeholders in a string<\/p>\n

Few methods as follow:<\/p>\n

a. .format() = is for simple positional formatting that\u00a0 uses to \u00a0substitute in place of braces {}.<\/p>\n

Example:<\/p>\n

>> print (‘Welcome to {}’.format(‘ Linux Tutorials’))
\nWelcome to Linux Tutorials<\/p>\n

>> title = “Linux Tutorials”
\n>>> print(‘Welcome to {}’.format(title))
\nWelcome to Linux Tutorials<\/p>\n

>> print (‘Welcome to {} {} {}’.format (‘Linux’, ‘Free’,’Tutorials’))
\nWelcome to Linux Free Tutorials
\n>>> print (‘Welcome to {1} {0} {2}’.format (‘Linux’, ‘Free’,’Tutorials’))
\nWelcome to Free Linux Tutorials<\/p>\n

>> print(‘Welcome to {1} {1}’.format(‘Free’,’Linux’))
\nWelcome to Linux Linux<\/p>\n

> print (‘Welcome to {f} {l} {t}’.format(l=’linux’,f=’free’,t=’tutorials’))
\nWelcome to free linux tutorials<\/p>\n

>> quotient = 200\/46
\n>>> quotient
\n4.3478260869565215
\n>>> print(‘The quotient is {q}’.format(q=quotient))
\nThe quotient is 4.3478260869565215<\/p><\/blockquote>\n

In float formatting, remember this: “{value:width.precision f}<\/strong>”<\/p>\n

quotient
\n4.3478260869565215
\n>>> print(‘The quotient is {q:1.2f}’.format(q=quotient))
\nThe quotient is 4.35
\n>>> print(‘The quotient is {q:1.6f}’.format(q=quotient))
\nThe quotient is 4.347826
\n>>> print(‘The quotient is {q:10.1f}’.format(q=quotient))
\nThe quotient is\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4.3<\/p><\/blockquote>\n

 <\/p>\n

b. f-strings (formatted strings literal) (introduced in python 3.6+)<\/p>\n

>> title =’Free Linux Tutorials’
\n>>> title
\n‘Free Linux Tutorials’
\n>>> print (f’Welcome to {title}’)
\nWelcome to Free Linux Tutorials<\/p>\n

>>> name = ‘Darwin’
\n>>> look = ‘handsome’
\n>>> print(f’The boy\\’s name is {name} and he is {look}’)
\nThe boy’s name is Darwin and he is handsome<\/p>\n

>> x = 88
\n>>> y = 10
\n>>> print (f’88 multiply by 10 is {x*y}’)
\n88 multiply by 10 is 880<\/p>\n

>> name = ‘Euan’
\n>>> sname = ‘James’
\n>>> age = ‘6’
\n>>> print(f’My son\\’s name is {name} {sname} and he is {age} yrs old.’)
\nMy son’s name is Euan James and he is 6 yrs old.<\/p><\/blockquote>\n

 <\/p>\n

c. Template strings – import Template class from Python\u2019s built-in string module to use it.<\/p>\n

Example:<\/p>\n

> from string import Template
\n>>> name = ‘Euan’
\n>>> sname = ‘James’
\n>>> full = Template(‘Hello $name $sname!’)
\n>>> print(full.substitute(name = name, sname = sname))
\nHello Euan James!<\/p><\/blockquote>\n

Old style Formatting:<\/p>\n

d. % formatting – is a unique built in operation that uses % operator to do string interpolation<\/p>\n

Example:<\/p>\n

>> name = ‘Euan’
\n>>> sname = ‘James’
\n>>> print(‘Hello %s %s !’%(name,sname))
\nHello Euan James !<\/p><\/blockquote>\n

 <\/p>\n

Take Note:
\nPython String Formatting Rule of Thumb: <\/span><\/p>\n

If your format strings are user-supplied, use Template Strings to avoid security issues. Otherwise, use f-Strings if you\u2019re on Python 3.6+, and\u00a0 str.format if you\u2019re not.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

String Interpolation is a process substituting values of variables into placeholders in a string Few methods as follow: a. .format() = is for simple positional formatting that\u00a0 uses to \u00a0substitute in place of braces {}. Example: >> print (‘Welcome to {}’.format(‘ Linux Tutorials’)) Welcome to Linux Tutorials >> title = “Linux Tutorials” >>> print(‘Welcome to…<\/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":[1],"tags":[22,20,19,9,21],"class_list":["post-56","post","type-post","status-publish","format-standard","hentry","category-blog","tag-format","tag-fstring","tag-interpolation","tag-string","tag-template"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts\/56","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=56"}],"version-history":[{"count":9,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts\/56\/revisions"}],"predecessor-version":[{"id":65,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/posts\/56\/revisions\/65"}],"wp:attachment":[{"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/media?parent=56"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/categories?post=56"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/python.freelinuxtutorials.com\/index.php\/wp-json\/wp\/v2\/tags?post=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}