• comparisons.py
• comparisons.py

#!# =============
#!#  Comparisons
#!# =============
#!#
#!# This page contains a memo on comparisons.

####################################################################################################

from Tools import *

####################################################################################################

#!# Let define some strings

s0 = 'abc'
s1 = 'def'

#!# Let define a reference or alias to :code:`s0`

s2 = s0

#!# :code:`s0` and :code:`s2` have the same *id*, address of the object in memory.

pretty_print([id(x) for x in (s0, s2, s1)])
#o#

print(id(s0) == id(s2))
#o#

#!# Equality Test
#!# -------------

print(s0 != s1)
#o#

print(s0 == s2)
#o#

#!# Reference Test
#!# --------------

print(s0 is not s1)
#o#

print(s0 is s2)
#o#

#!# Comparison Tests
#!# ----------------

x = 2
print(0 <= x < 10)
#o#

#!# shorter than

0 <= x and x < 10

3.3.2. Comparisons

This page contains a memo on comparisons.

from Tools import *

Let define some strings

s0 = 'abc'
s1 = 'def'

Let define a reference or alias to s0

s2 = s0

s0 and s2 have the same id, address of the object in memory.

pretty_print([id(x) for x in (s0, s2, s1)])

[   139877472330784,
    139877472330784,
    139877471407664]

print(id(s0) == id(s2))

True

3.3.2.1. Equality Test

print(s0 != s1)

True

print(s0 == s2)

True

3.3.2.2. Reference Test

print(s0 is not s1)

True

print(s0 is s2)

True

3.3.2.3. Comparison Tests

x = 2
print(0 <= x < 10)

True

shorter than

0 <= x and x < 10