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Size: 2352
Comment: add new style string formatting example
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| Deletions are marked like this. | Additions are marked like this. |
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| print 'Hello world!' | print 'Hello world!' # Python 2 syntax # or print('Hello world!') # Python 3 syntax |
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| x=1 y=2 print 'x is equal to y: %s' % (x==y) z=1 print 'x is equal to z: %s' % (x==z) names=['Donald','Jake','Phil'] words=['Random','Words','Dogs'] if names==words: |
x = 1 y = 2 print 'x is equal to y: %s' % (x == y) z = 1 print 'x is equal to z: %s' % (x == z) names = ['Donald', 'Jake', 'Phil'] words = ['Random', 'Words', 'Dogs'] if names == words: |
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| print 'Names list isn\'t equal to words' new_names=['Donald','Jake','Phil'] print 'New names list is equal to names: %s' % (new_names==names) |
print "Names list isn't equal to words" new_names = ['Donald', 'Jake', 'Phil'] print 'New names list is equal to names: %s' % (new_names == names) |
| Line 56: | Line 60: |
| numbered_words=dict() numbered_words[2]='world' numbered_words[1]='Hello' numbered_words[3]='!' |
numbered_words = dict() numbered_words[2] = 'world' numbered_words[1] = 'Hello' numbered_words[3] = '!' |
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| if value==wanted_value: | if value == wanted_value: |
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| for x in xrange(1,4): | for x in xrange(1, 4): |
| Line 93: | Line 97: |
| 'This is time number %d') % (x) | 'This is time number %d') % x |
Here are some samples to help get a better idea of Python's syntax:
Hello World (the traditional first program)
print 'Hello world!' # Python 2 syntax
# or
print('Hello world!') # Python 3 syntax
String formatting
name = 'Monty'
print('Hello, %s' % name) # string interpolation
print('Hello, {}'.format(name)) # string formatting
Defining a function
def add_one(x):
return x + 1
Testing variable equality
x = 1
y = 2
print 'x is equal to y: %s' % (x == y)
z = 1
print 'x is equal to z: %s' % (x == z)
names = ['Donald', 'Jake', 'Phil']
words = ['Random', 'Words', 'Dogs']
if names == words:
print 'Names list is equal to words'
else:
print "Names list isn't equal to words"
new_names = ['Donald', 'Jake', 'Phil']
print 'New names list is equal to names: %s' % (new_names == names)
Defining a class with two methods
class Talker(object):
def greet(self, name):
print 'Hello, %s!' % name
def farewell(self, name):
print 'Farewell, %s!' % name
Defining a list
dynamic_languages = ['Python', 'Ruby', 'Groovy']
dynamic_languages.append('Lisp')
Defining a dictionary
numbered_words = dict()
numbered_words[2] = 'world'
numbered_words[1] = 'Hello'
numbered_words[3] = '!'
Defining a while loop
while True:
if value == wanted_value:
break
else:
pass
Defining multiline strings
string = '''This is a string with embedded newlines.
Also known as a tripled-quoted string.
Whitespace at the beginning of lines is included,
so the above line is indented but the others are not.
'''
Defining long strings over multiple lines
string = ('This is a single long, long string'
' written over many lines for convenience'
' using implicit concatenation to join each'
' piece into a single string without extra'
' newlines (unless you add them yourself).')
Defining a for loop
for x in xrange(1, 4):
print ('Hello, new Python user!'
'This is time number %d') % x