variable_types.py

python编程很好的入门材料,包括讲义和源码.

#-------------------------------------------------------------------------------
# The variable "myNumber" is being used to hold an integer value of 25
#-------------------------------------------------------------------------------

myNumber = 25
print myNumber
print type( myNumber )
print ""

#-------------------------------------------------------------------------------
# The variable "myBigNumber" is being used to hold a long integer value of
# 4294967296L. Note how it ends with a capital 'L'.
#-------------------------------------------------------------------------------

myBigNumber = 4294967296L
print myBigNumber
print type( myBigNumber )
print ""

#-------------------------------------------------------------------------------
# The variable "pi" is being used to hold a float value of 3.141592653589793.
#
# NOTE: The Python variable types "int" and "float" have limited precision,
# which means there is a limit on how big or small the number can be.
# Run the script and note how "pi" gets chopped off and rounded up.
#-------------------------------------------------------------------------------

pi = 3.141592653589793
print pi
print type( pi )
print ""

#-------------------------------------------------------------------------------
# The variable "myBoolean" is being used to hold the Boolean value of True
#-------------------------------------------------------------------------------

myBoolean = True
print myBoolean
print type( myBoolean )
print ""

#-------------------------------------------------------------------------------
# The variable "myString" is being used to hold the string value
# "This is my string!"
#-------------------------------------------------------------------------------

myString = "This is my string!"
print myString
print type( myString )
print ""

#-------------------------------------------------------------------------------
# The variable "myList" is being used to hold several integer values.
#-------------------------------------------------------------------------------

myList = [25, 50, 75, 100]

# You can print each integer value by accessing its index
print myList[0]
print myList[1]
print myList[2]
print myList[3]
print type( myList )

raw_input( "\nPress Enter to exit..." )