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Text in python

Strings in python

Simple string:
a = "Simple string"
b = 'or with single quotes'
Comment:
# this is a comment
Multiline comment:
# 1 this
# 2 is
# 3 a
# 4 multiline
# 5 comment
String with a quote
c = "Mario's pizza"
d = 'she says: "Hi"'
String with single and double quotes
e = """Within triple quotes you'll do "anything". """
DocString
def myFunc():
	"""Here we can explain what myFunc does"""
	pass

usage:

myFunc.func_doc
# or
help(myFunc)

The help() tool will open a special help screen, where you can read all about the topic. As example, try the following with the previously installed noise library.

import noise
help(noise)

Note: to exit the help() screen, press the Q key.

String concatenation
"Hello " + "World"

becomes

'Hello World'
String Formatting
"Hello %s, how are you %s?" % ("Dirk", "today")

outputs

"Hello Dirk, how are you today?"

You can use these placeholders:

  • %s for String
  • %d for Integer digits
  • %f for Float

Example:

"To buy %d %s will cost you %f" % (3, "beers", 7.5)

outputs:

'To buy 3 beers will cost you 7.500000'

Float precision

"%.2f" % (7.5)

gives:

'7.50'
Count chacters
len("abacadabra hocus pocus")

returns

22

More advanced stuff you could do with strings

  • convert a number to a string
  • convert a string into a number (if applicable)
  • make lowercase / UPPERCASE / Capitalize Each Word
  • count the number of occurances of a substring (or single character)
  • split string into (an array) of words
  • strip off characters from the beginning or end (e.g. whitespace)
  • ...