Python使用if语句验证多个值

时间:2018-11-30 13:47:15

标签: python python-2.7

Example1要检查单个值:

def validate(self, data, check, col):
    output = []
    for key, value in data.iteritems():
        try:
            if value[col] == check:
                output.append("{},{},Passed".format(key,value[col]))
            else:
                output.append("{},{},Failed".format(key,value[col]))
        except IndexError as e:
            pass
    return output


data1 = {key1:['a','b','c','ok'], key2:['a','b','c','down']}
check = "ok"
col = 3
print self.validate(data1, check, col)

输出:

['key1','ok','Passed', 'key2','down','Failed']

Example2要检查两个值:

 data1 = {key1:['a','b','c','ok', "True"], key2:['a','b','c','down', "False"]}

 def validate(self, data, check1, check2, col1, col2):
    output = []
    for key, value in data.iteritems():
        try:
            if value[col1] == check1 and value[col2] == check2:
                output.append("{},{},{},Passed".format(key,value[col1], value[col2]))
            else:
                output.append("{},{},Failed".format(key,value[col1], value[col2]))
        except IndexError as e:
            pass
    return output

有一种方法可以在一个代码中实现上述两个示例(验证多个值一,二,三,四)

2 个答案:

答案 0 :(得分:1)

为什么不将all与列/校验值的压缩列表一起使用?

if all(value[col] == check for col,check in zip((col1,col2),(check1,check2))):

如果您有更多参数,建议您打开:

def validate(self, data, check1, check2, col1, col2):

进入

def validate(self, data, check_values, columns):

因此您可以适应:

if all(value[col] == check for col,check in zip(columns,check_values)):

此外,由于这些值和列已链接,因此可以直接传递元组列表或将它们链接在一起的字典到validate

答案 1 :(得分:0)

如果您不需要在一个对象/返回中全部输出,我们可以对您的第一个功能进行一些调整。

from collections import defaultdict

def validate(data, check_value, column_index):
    # validating whether the list item at column_index == check_value
    output = defaultdict(list)
    for k,v in data.items():  # for python2, use data.iteritems()
        if check_value in v and column_index <= len(v) and v[column_index] == check_value:
            output[check_value].append({k: [v[column_index], 'passed']})
        else:
            output[check_value].append({k: [v[column_index], 'failed']})
    return output

对于单值测试,这应该返回相同的预期结果。

您可以对多个值执行以下操作:

check_values = ['ok', 'b']
column_indices = [3, 2]

for value, index in zip(check_values, column_indices):
    validate(data, value, index)

哪个返回:

defaultdict(<class 'list'>, {'ok': [{'key1': ['ok', 'passed']}, {'key2': ['down', 'failed']}]})
defaultdict(<class 'list'>, {'b': [{'key1': ['c', 'failed']}, {'key2': ['c', 'failed']}]})