Split data-files.org into numbers and strings.
* Data Types
*** Outline
***** Introduction
******* What are we going to do?
******* How are we going to do?
******* Arsenal Required
********* None
*** Script
Welcome friends.
In this tutorial we shall look at data types available in Python and
how to perform simple Input and Output operations.
for 'Numbers' we have: int, float, complex datatypes
for Text content we have strings.
For conditional statements, 'Booleans'.
Now we shall look at Python Strings.
In python anything enclosed inside quotes(single or double) is a string
so
a = 'This is a string'
print a
b = "This too!"
print b
c = '''This one too!'''
print c
d = """And one more."""
print d
Similar to lists we covered earlier even string elements can be accessed
via index numbers starting from 0
print a[0]
print a[5]
will
To access last element we can use a[-1] which is one of Pythons feature.
print a[-1]
len function works with the strings also as it does with the arrays and
returns length of the string.
One thing to notice about the string variables is that they are
immutable, that is
a[0] = 't'
will throw an error
Some of methods available for string are:
a.startswith('Thi')
returns true if initial of the string is same
similarly there is endswith
a.endswith('ING')
a.upper() returns a string with all letters capitalized.
and a.lower() returns a string with all smaller case letters.
As we have seen earlier use of split function, it returns the list after
splitting the string, so
a.split()
will give list with three elements.
we also have 'join' function, which does the opposite of what
split does.
''.join(['a','b','c']) will return a joined string of the list we pass
to it. Since join is performed on '' that is empty string we get 'abc'
if we do something like
'-'.join(['a','b','c'])
we come to the end of this tutorial on introduction of Data types in
Python. In this tutorial we have learnt what are supported data types,
supported operations and performing simple IO operations in Python.
*** Notes