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Python Programming Essentials - M9 - String Formatting
This document discusses string formatting in Python. It explains that Python uses placeholders like %s and %d to format strings with values. The % operator method of string formatting is deprecated in Python 3 and the str.format() method is recommended instead. The format() method allows accessing formatting arguments by position or name to customize the order and labels of values in formatted strings.
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In this document
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This slide introduces the Skillbrew platform and the presenter, Pavan Verma, focusing on Python programming essentials.
Explains basic string formatting with examples using placeholders for strings (%s), numbers (%d), and float (%f).
Provides additional examples of string formatting, mentioning the use of % operator which is deprecated in Python 3.
Reiterates that the % operator for string formatting is deprecated in Python 3, stressing the need for alternatives.
Introduces the str.format() method for formatting strings with examples, showcasing its usage.
Demonstrates how to access formatting arguments by their position within the format() method with practical examples.
Explains how to access formatting arguments by names, allowing for more readable and manageable code.
Offers resources and examples for further understanding of string formatting in Python.
No content provided in this slide.
Python Programming Essentials - M9 - String Formatting
- 1.http://www.skillbrew.com/SkillbrewTalent brewed bytheindustry itselfString formattingPavan VermaPython Programming Essentials@YinYangPavan
- 2.© SkillBrew http://skillbrew.comFormattingstrings2>>> name = "Monty Python">>> "Python is named after %s" % name'Python is named after Monty Python'>>> age = 12>>> "this cat is %d years old" % age'this cat is 12 years old'Python usesplaceholders toformat stringsStrings: %sNumbers: %dFloat: %f
- 3.© SkillBrew http://skillbrew.comFormattingstrings (2)3>>> os = "Android">>> version = 4.2>>> "my phone uses %s %d" % (os, version)'my phone uses Android 4'>>> "The value of Pi is %f" % 3.141592'The value of Pi is 3.141592'>>> "The value of Pi is %.2f" % 3.141592'The value of Pi is 3.14'Use of % operator has been deprecated in Python 3.x
- 4.© SkillBrew http://skillbrew.comFormattingstrings with % operator4Use of % operator has been deprecated in Python 3.x
- 5.© SkillBrew http://skillbrew.comformat()method5>>> 'this is a sample {0}'.format('string')'this is a sample string'str.format()Strings have an inbuilt method formatused to format strings
- 6.© SkillBrew http://skillbrew.comAccessingarguments by position6>>> os = 'Android'>>> version = 4.2>>> 'phone uses {0} version {1}'.format(os, version)'phone uses Android version 4.2'>>> 'version no:{1} os:{0}'.format(os, version)'version no:4.2 os:Android'>>> '{0} v{1} version {1}'.format(os, version)'Android v4.2 version 4.2'
- 7.© SkillBrew http://skillbrew.comAccessingarguments by name7>>> 'phone uses {os} version {ver}'.format(os='ios', ver=7.0)'phone uses ios version 7.0‘>>> 'phone uses {os} version {ver}'.format(ver=4.2, os='android')'phone uses android version 4.2'
- 8.© SkillBrew http://skillbrew.comResourcesString formatting exampleshttp://docs.Python.org/2/library/string.html#format-examples8
- 9.
Editor's Notes
- #7 Positioning of arguments is critical (1st snippet and 2nd snippet in this slide)