Python Tutorial ( PDFDrive )
print "radians(3) : ", math.radians(3)print "radians(-3) : ", math.radians(-3)print "radians(0) : ", math.radians(0)print "radians(math.pi) : ", math.radians(math.pi)print "radians(math.pi/2) : ", math.radians(math.pi/2)print "radians(math.pi/4) : ", math.radians(math.pi/4)Let us compile and run the above program, this will produce the following result:radians(3) : 0.0523598775598radians(-3) : -0.0523598775598radians(0) : 0.0radians(math.pi) : 0.0548311355616radians(math.pi/2) : 0.0274155677808radians(math.pi/4) : 0.0137077838904Mathematical Constants: The module also defines two mathematical constants:ConstantsDescriptionPiThe mathematical constant pi.E The mathematical constant e.TUTORIALS POINT Simply Easy Learning
CHAPTER9Python StringsStrings are amongst the most popular types in Python. We can create them simply by enclosing charactersin quotes. Python treats single quotes the same as double quotes.Creating strings is as simple as assigning a value to a variable. For example:var1 = 'Hello World!'var2 = "Python Programming"Accessing Values in Strings: Python does not support a character type; these are treated as strings of length one, thus also considered asubstring.To access substrings, use the square brackets for slicing along with the index or indices to obtain your substring.Following is a simple example:#!/usr/bin/pythonvar1 = 'Hello World!'var2 = "Python Programming"print "var1[0]: ", var1[0]print "var2[1:5]: ", var2[1:5]When the above code is executed, it produces the following result:var1[0]: Hvar2[1:5]: ythoUpdating Strings: You can "update" an existing string by (re)assigning a variable to another string. The new value can be related toits previous value or to a completely different string altogether. Following is a simple example:#!/usr/bin/pythonvar1 = 'Hello World!'TUTORIALS POINT Simply Easy Learning
- Page 69 and 70: | Binary OR Operator copies a bit i
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- Page 73 and 74: if ( id(a) == id(b) ):print "Line 2
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- Page 99 and 100: import math# This will import math
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- Page 103 and 104: modf(x) Description The method modf
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- Page 113 and 114: asin(x)Note: This function is not a
- Page 115 and 116: print "atan2(-10,10) : ", math.atan
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- Page 119: import mathprint "degrees(3) : ", m
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- Page 141 and 142: str = "-";seq = ("a", "b", "c"); #
- Page 143 and 144: lstrip() Description The method lst
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CHAPTER
9
Python Strings
Strings are amongst the most popular types in Python. We can create them simply by enclosing characters
in quotes. Python treats single quotes the same as double quotes.
Creating strings is as simple as assigning a value to a variable. For example:
var1 = 'Hello World!'
var2 = "Python Programming"
Accessing Values in Strings:
Python does not support a character type; these are treated as strings of length one, thus also considered a
substring.
To access substrings, use the square brackets for slicing along with the index or indices to obtain your substring.
Following is a simple example:
#!/usr/bin/python
var1 = 'Hello World!'
var2 = "Python Programming"
print "var1[0]: ", var1[0]
print "var2[1:5]: ", var2[1:5]
When the above code is executed, it produces the following result:
var1[0]: H
var2[1:5]: ytho
Updating Strings:
You can "update" an existing string by (re)assigning a variable to another string. The new value can be related to
its previous value or to a completely different string altogether. Following is a simple example:
#!/usr/bin/python
var1 = 'Hello World!'
TUTORIALS POINT
Simply Easy Learning
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