Python |从给定字典中过滤负值
给定一个字典，任务是过滤给定字典中的所有负值。让我们讨论一些方法来完成这项任务。
方法#1:使用字典理解
# Python code to demonstrate
# return the filtered dictionary
# on certain criteria
from six import iteritems
# Initialising dictionary
ini_dict = {'a':1, 'b':-2, 'c':-3, 'd':7, 'e':0}
# printing initial dictionary
print ("initial lists", str(ini_dict))
# filter dictionary such that no value is greater than 0
result = dict((k, v) for k, v in ini_dict.items() if v >= 0)
print("resultant dictionary : ", str(result))
Output:
initial lists {'a': 1, 'c': -3, 'd': 7, 'b': -2, 'e': 0}
resultant dictionary : {'a': 1, 'd': 7, 'e': 0}
方法 2:使用λ和滤波器
# Python code to demonstrate
# return the filtered dictionary
# on certain criteria
from six import iteritems
# Initialising dictionary
ini_dict = {'a':1, 'b':-2, 'c':-3, 'd':7, 'e':0}
# printing initial dictionary
print ("initial lists", str(ini_dict))
# filter dictionary such that no value is greater than 0
result = dict(filter(lambda x: x[1] >= 0.0, ini_dict.items()))
result = dict(result)
print("resultant dictionary : ", str(result))
Output:
initial lists {'c': -3, 'd': 7, 'e': 0, 'a': 1, 'b': -2}
resultant dictionary : {'e': 0, 'a': 1, 'd': 7}
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