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Copy pathoperator_ope.py
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70 lines (54 loc) · 1.29 KB
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# _*_ coding:utf-8 _*_
"""
python operator module usage, cited from
https://docs.python.org/2/library/operator.html
"""
import operator
def cmp_fun():
a, b = 5, 3
print operator.le(a, b)
# False
print operator.gt(a, b)
# True
def lst_ope():
lst = [1, 2, 3]
print operator.indexOf(lst, 2)
# 1
lst1 = [1, 2, 3, 2]
print operator.countOf(lst1, 2)
# 2
def cal_ope():
lst1 = [0, 1, 2, 3]
lst2 = [10, 20, 30, 40]
print map(operator.mul, lst1, lst2)
# [0, 20, 60, 120]
print sum(map(operator.mul, lst1, lst2))
# 200
a, b = 1, 3
print operator.iadd(a, b)
# 4
def item_ope():
s = ['h', 'e', 'l', 'l', 'o']
print operator.getitem(s, 1)
# e
print operator.itemgetter(1, 4)(s)
# ('e', 'o')
inventory = [('apple', 3), ('banana', 2), ('pear', 5), ('orange', 1)]
get_count = operator.itemgetter(1)
print map(get_count, inventory)
# [3, 2, 5, 1]
print sorted(inventory, key=get_count)
# [('orange', 1), ('banana', 2), ('apple', 3), ('pear', 5)]
def reduce_ope():
a = [2, 3, 4, 5]
print reduce(lambda x, y: x + y, a)
# 14
print reduce(operator.add, a)
# 14
if __name__ == '__main__':
reduce_ope()
# item_ope()
# cal_ope()
# lst_ope()
# cmp_fun()
pass