我正在研究一种检查数据文件格式的脚本(例如csv)
我在每个字段上应用各种规则:最大长度,空白字段,值边界,正则表达式以匹配(检查有效电子邮件)等...
这些规则在字典中(每个collum有一个):
#column 1 : integer from 1 to 99, except 10
{
"minval":1,
"forbiddenvals": [10,15],
"maxval":100
}
我的函数定义如下:
def vercol(data,
empty=False,isadate = None,
minlen=None,maxlen=None,
minval=None,maxval=None,
allowedvals=[],forbiddenvals=[],
regex =None):
"""
Verify if the field 'data' checks the rules
Parameters /Rules
----------
empty : Boolean, optional
set to True if empty field is accepted. The default is False.
minlen : integer, optional
If set, minimum length for the field.
maxlen : integer, optional
If set, maximum length for the field.
forbidenvals : List, optional
List of rejected values.
(...)
Returns
-------
True if all the rules are met.
"xError" if a test failled, where x depend of the wich test failed FIRST
"""
if data == "":
return True if empty else "EmptyFieldError"
if minlen and len(data) < int(minlen):
return "MinLengthError"
....
other rules
....
return True
当我正常调用参数时,该函数无法正常工作:
我想做的就是通过这样的字典:
rules = {
"minval":1,
"forbiddenvals": [10,15],
"maxval":100
}
result = vercol(field, rules)
#foo
问题:它不起作用,尽管存在于字典中,参数仅使用其默认值。
#works fine
vercol('abcdefghi', maxlen=4) #return "MaxLenError"
vercol('', maxlen=4) #return "EmptyFieldError"
vercol('', empty=True) #return True
#problem
rule = {"maxlen":4,"empty":False}
vercol('',rule) #retuns True , expected : "EmptyFieldError"
vercol('abcdefgh',rule) #retuns True , expected : "MaxLenError"
有解决这个问题的线索吗?
答案 0 :(得分:0)
您必须使用**解开字典。尝试
rules = {
"minval":1,
"forbiddenvals": [10,15],
"maxval":100
}
result = vercol(field, **rules)