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Material Type: Notes; Professor: Stepp; Class: COMPUTER PRGRMNG I; Subject: Computer Science and Engineering; University: University of Washington - Seattle; Term: Unknown 2008;
Typology: Study notes
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Special thanks to Scott Shawcroft, Ryan Tucker, and Paul Beck for their work on these slides.
Except where otherwise noted, this work is licensed under:http://creativecommons.org/licenses/by-nc-sa/3.
-^
-^
-^
-^
-^
-^
-^
-^
-^ script
: A program meant for use in small/medium projects
-^
Windows: •^
Download Python fromhttp://www.python.org
-^
Install Python.
-^
Run
Idle
from the Start Menu.
Mac OS X: •^
Python is already installed.
-^
Open a terminal and run
python
or run Idle from Finder. Linux: •^
Chances are you already have
-^
Chances are you already have Python installed.
To check, run
python
from the terminal.
-^
If not, install from yourdistribution's package system.
Note:
For step by step installation instructions, see the course web site.
-^
-^
-^ Syntax:
#^ comment text (one line) swallows2.py^1
# Suzy Student, CSE 142, Fall 2097 1 2 3 4 5 6
# Suzy Student, CSE 142, Fall 2097 # This program prints important messages. print "Hello, world!"print
# blank line
print "Suppose two swallows "carry" it together."print 'African or "European" swallows?'
-^
Example:
-^
add, subtract/negate, multiply, divide
exponentiate
modulus, a.k.a. remainder
-^
have a higher precedence than
is^
is
-^
-^
name
expression
x^
gpa
x^
5
gpa
x^
is
-^
print "Subtotal:"print 38 + 40 + 30print "Tax:"print (38 + 40 + 30) * .09 print "Tip:" print "Tip:" print (38 + 40 + 30) * .15print "Total:"print 38 + 40 + 30 + (38 + 40 + 30) * .15 + (38 + 40 + 30) *.
-^
command
value
command
value
,^ value
value
-^
-^
sqrt(
sqrt(
x^ =
sqrt(
x^
+^ sqrt(16)
Function name
Description
abs(
value
)^
absolute value
ceil(
value
)^
rounds up
cos(
value
)^
cosine, in radians
floor(
value
)^
rounds down
log10(
value
)^
logarithm, base 10
max(
value
,^ value
)^
larger of two values
Constant
Description e^
2.7182818...
pi^
3.1415926...
-^
math
import
max(
value
,^ value
)^
larger of two values
min(
value
,^ value
)^
smaller of two values
round(
value
)^
nearest whole number
sin(
value
)^
sine, in radians
sqrt(
value
)^
square root
-^
condition
statements
-^ Example: -^ Example:^ gpa
= input("What
is
your
GPA?
")
if gpa
>^
2.0: print
"Your
application
is
accepted."
