如果有其他问题，用python方法处理_Python_Python 3.x

如果有其他问题，用python方法处理

python python-3.x

如果有其他问题，用python方法处理,python,python-3.x,Python,Python 3.x,问题： from dateutil.parser import parse origin_dest_date = { "originDate": "2019-06-30 23:59:00.000", "destDate": None } isoriginDate = False isdestDate = Fa

问题：

from dateutil.parser import parse

origin_dest_date =  {                        
                        "originDate": "2019-06-30 23:59:00.000",
                        "destDate": None
                    }

isoriginDate = False
isdestDate = False

if 'originDate' in origin_dest_date:    
    isoriginDate = True
    if origin_dest_date['originDate'] is not None and \
        not origin_dest_date['originDate'] == '':
        parse(origin_dest_date['originDate'])
    if origin_dest_date['originDate'] == '':
        origin_dest_date['originDate'] = None
if 'destDate' in origin_dest_date:    
    isdestDate = True        
    if origin_dest_date['destDate'] is not None and \
        not origin_dest_date['destDate'] == '':
        parse(origin_dest_date['destDate'])
    if origin_dest_date['destDate'] == '':
        origin_dest_date['destDate'] = None

if isoriginDate and not isdestDate:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and isdestDate:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isoriginDate and origin_dest_date['originDate'] is None and \
    isdestDate and \
        origin_dest_date['destDate'] is not None:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isdestDate and \
    origin_dest_date['destDate'] is None and \
        isoriginDate and \
        origin_dest_date['originDate'] is not None:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and not isdestDate:
    origin_dest_date['originDate'] = None
    origin_dest_date['destDate'] = None

print(origin_dest_date)

>>> date_struc =  {"originDate": None, "destDate": None}

    origin_dest_date_1 =  {"originDate": "2019-06-30 23:59:00.000", "destDate": None}

>>> org_dest(origin_dest_date_1) # test-2 output

    {'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}


>>> origin_dest_date_2 =  {"originDate": "2019-06-30 23:59:00.000"}

>>> org_dest(origin_dest_date_2) #test-2 output

{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

我有一个非常简单的问题，我需要将一个日期（origDate或destDate）更新为另一个日期（origDate或destDate），如果两个日期中的任何一个都不存在、为空或不存在，并且如果这两个日期都不存在，则将它们都设置为无

我正在寻找一种蟒蛇式的方法来实现这一点。我当前的代码工作正常，但很冗长

输入示例：

1.    origin_dest_date =  {                        
                            "originDate": "2019-06-30 23:59:00.000",
                            "destDate": None
                        }
2.   origin_dest_date =  {                        
                            "originDate": "2019-06-30 23:59:00.000"
                        }
3.    origin_dest_date =  {                        
                                "originDate": ""
                            }

输出：

1.  origin_dest_date =  {                        
                                "originDate": "2019-06-30 23:59:00.000",
                                "destDate": "2019-06-30 23:59:00.000"
                            }
2.  origin_dest_date =  {                        
                                "originDate": "2019-06-30 23:59:00.000",
                                "destDate": "2019-06-30 23:59:00.000"
                            }

起始日期={
“原始日期”：无， “日期”：无 }

我的代码：

from dateutil.parser import parse

origin_dest_date =  {                        
                        "originDate": "2019-06-30 23:59:00.000",
                        "destDate": None
                    }

isoriginDate = False
isdestDate = False

if 'originDate' in origin_dest_date:    
    isoriginDate = True
    if origin_dest_date['originDate'] is not None and \
        not origin_dest_date['originDate'] == '':
        parse(origin_dest_date['originDate'])
    if origin_dest_date['originDate'] == '':
        origin_dest_date['originDate'] = None
if 'destDate' in origin_dest_date:    
    isdestDate = True        
    if origin_dest_date['destDate'] is not None and \
        not origin_dest_date['destDate'] == '':
        parse(origin_dest_date['destDate'])
    if origin_dest_date['destDate'] == '':
        origin_dest_date['destDate'] = None

if isoriginDate and not isdestDate:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and isdestDate:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isoriginDate and origin_dest_date['originDate'] is None and \
    isdestDate and \
        origin_dest_date['destDate'] is not None:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isdestDate and \
    origin_dest_date['destDate'] is None and \
        isoriginDate and \
        origin_dest_date['originDate'] is not None:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and not isdestDate:
    origin_dest_date['originDate'] = None
    origin_dest_date['destDate'] = None

print(origin_dest_date)

>>> date_struc =  {"originDate": None, "destDate": None}

    origin_dest_date_1 =  {"originDate": "2019-06-30 23:59:00.000", "destDate": None}

>>> org_dest(origin_dest_date_1) # test-2 output

    {'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}


>>> origin_dest_date_2 =  {"originDate": "2019-06-30 23:59:00.000"}

>>> org_dest(origin_dest_date_2) #test-2 output

{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

代码中需要改进的两个主要方面：

from dateutil.parser import parse

origin_dest_date = { "originDate": "2019-06-30 23:59:00.000", "destDate": None }

origin = origin_dest_date.get("originDate")
dest = origin_dest_date.get("destDate")

if origin and not dest:
    origin_dest_date["destDate"] = parse(origin)
elif not origin and dest:
    origin_dest_date["originDate"] = parse(dest)
elif not origin and not dest:
    if origin_dest_date.setdefault("originDate", None) is not None:  # conditional for empty string
        origin_dest_date["originDate"] = None
    if origin_dest_date.setdefault("destDate", None) is not None:  # conditional for empty string
        origin_dest_date["destDate"] = None

使用变量使其看起来更清晰，尤其是条件，这样您就不会在字典中重复访问相同的值
使用dictionary
```
get
```
方法查找键-如果键存在，则返回相应的值；如果
```
None
```
不存在，则返回相应的值。然后简单地检查返回的值在Python中是否为truthy，它同时解释了
```
None
```
和空字符串<代码>设置默认值也可用于设置末尾的值

这是一个如何实现这些功能以简化代码的示例：

from dateutil.parser import parse

origin_dest_date = { "originDate": "2019-06-30 23:59:00.000", "destDate": None }

origin = origin_dest_date.get("originDate")
dest = origin_dest_date.get("destDate")

if origin and not dest:
    origin_dest_date["destDate"] = parse(origin)
elif not origin and dest:
    origin_dest_date["originDate"] = parse(dest)
elif not origin and not dest:
    if origin_dest_date.setdefault("originDate", None) is not None:  # conditional for empty string
        origin_dest_date["originDate"] = None
    if origin_dest_date.setdefault("destDate", None) is not None:  # conditional for empty string
        origin_dest_date["destDate"] = None

代码中需要改进的两个主要方面：

from dateutil.parser import parse

origin_dest_date = { "originDate": "2019-06-30 23:59:00.000", "destDate": None }

origin = origin_dest_date.get("originDate")
dest = origin_dest_date.get("destDate")

if origin and not dest:
    origin_dest_date["destDate"] = parse(origin)
elif not origin and dest:
    origin_dest_date["originDate"] = parse(dest)
elif not origin and not dest:
    if origin_dest_date.setdefault("originDate", None) is not None:  # conditional for empty string
        origin_dest_date["originDate"] = None
    if origin_dest_date.setdefault("destDate", None) is not None:  # conditional for empty string
        origin_dest_date["destDate"] = None

使用变量使其看起来更清晰，尤其是条件，这样您就不会在字典中重复访问相同的值
使用dictionary
```
get
```
方法查找键-如果键存在，则返回相应的值；如果
```
None
```
不存在，则返回相应的值。然后简单地检查返回的值在Python中是否为truthy，它同时解释了
```
None
```
和空字符串<代码>设置默认值也可用于设置末尾的值

这是一个如何实现这些功能以简化代码的示例：

from dateutil.parser import parse

origin_dest_date = { "originDate": "2019-06-30 23:59:00.000", "destDate": None }

origin = origin_dest_date.get("originDate")
dest = origin_dest_date.get("destDate")

if origin and not dest:
    origin_dest_date["destDate"] = parse(origin)
elif not origin and dest:
    origin_dest_date["originDate"] = parse(dest)
elif not origin and not dest:
    if origin_dest_date.setdefault("originDate", None) is not None:  # conditional for empty string
        origin_dest_date["originDate"] = None
    if origin_dest_date.setdefault("destDate", None) is not None:  # conditional for empty string
        origin_dest_date["destDate"] = None

以下是我的尝试：

def fill_dict（起始/目的日期，键1，键2）：
如果不是来源地日期获取（键1）：
来源地日期[key1]=来源地日期。获取（key2）或无
填写日期（起始日期、终止日期、起始日期）
填写日期（起始日期、终止日期、起始日期、终止日期）

关键思想是：

使用如果字典中不存在键，则返回

None

使用松散的

if

语句。空字符串或

None

（如果字典中不存在键，则为这种情况）将解析为

False

以下是我的尝试：

def fill_dict（起始/目的日期，键1，键2）：
如果不是来源地日期获取（键1）：
来源地日期[key1]=来源地日期。获取（key2）或无
填写日期（起始日期、终止日期、起始日期）
填写日期（起始日期、终止日期、起始日期、终止日期）

关键思想是：

使用如果字典中不存在键，则返回

None

使用松散的

if

语句。空字符串或

None

（如果字典中不存在键，则为这种情况）将解析为

False

使用自定义函数和示例模板dict：

def arrange_date_keys(d):
    temp = {'originDate': None, 'destDate': None}   # sample dict
    if not d.get('originDate') or not d.get('destDate'):
        date_value = d.get('originDate') or d.get('destDate')
        return temp.fromkeys(temp, date_value)
    return d


origin_dest_date1 = {
    "originDate": "2019-06-30 23:59:00.000",  "destDate": None
}
origin_dest_date2 = {
    "originDate": "2019-06-30 23:59:00.000"
}
origin_dest_date3 = {
    "originDate": ""
}
origin_dest_date4 = {
    "originDate": "2019-06-30 23:59:00.000",  "destDate": "2019-06-30 23:59:00.000"
}

print(arrange_date_keys(origin_dest_date1))
print(arrange_date_keys(origin_dest_date2))
print(arrange_date_keys(origin_dest_date3))
print(arrange_date_keys(origin_dest_date4))

连续输出：

{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}
{'originDate': None, 'destDate': None}
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

使用自定义函数和示例模板dict：

def arrange_date_keys(d):
    temp = {'originDate': None, 'destDate': None}   # sample dict
    if not d.get('originDate') or not d.get('destDate'):
        date_value = d.get('originDate') or d.get('destDate')
        return temp.fromkeys(temp, date_value)
    return d


origin_dest_date1 = {
    "originDate": "2019-06-30 23:59:00.000",  "destDate": None
}
origin_dest_date2 = {
    "originDate": "2019-06-30 23:59:00.000"
}
origin_dest_date3 = {
    "originDate": ""
}
origin_dest_date4 = {
    "originDate": "2019-06-30 23:59:00.000",  "destDate": "2019-06-30 23:59:00.000"
}

print(arrange_date_keys(origin_dest_date1))
print(arrange_date_keys(origin_dest_date2))
print(arrange_date_keys(origin_dest_date3))
print(arrange_date_keys(origin_dest_date4))

连续输出：

{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}
{'originDate': None, 'destDate': None}
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

更新：

    try:
        if 'destDate' not in origin_dest_date:
            origin_dest_date['destDate'] = origin_dest_date['originDate']
        elif not origin_dest_date['destDate']:
            origin_dest_date['destDate'] = origin_dest_date['originDate']
    except KeyError as e:
        pass
    print(origin_dest_date)

更新：

    try:
        if 'destDate' not in origin_dest_date:
            origin_dest_date['destDate'] = origin_dest_date['originDate']
        elif not origin_dest_date['destDate']:
            origin_dest_date['destDate'] = origin_dest_date['originDate']
    except KeyError as e:
        pass
    print(origin_dest_date)

试试这个

>>> def org_dest(d):
      for k,v in d.items():
          date_struc[k]=v
      if all(date_struc.values()):
          pass
      else:
          for k,v in date_struc.items():
              if not v:
                  date_struc[k]= "".join([val for val in date_struc.values() if val])
      return date_struc

最终结构，默认值为

None

，将由函数更新

>>> date_struc =  {"originDate": None, "destDate": None}

测试：

from dateutil.parser import parse

origin_dest_date =  {                        
                        "originDate": "2019-06-30 23:59:00.000",
                        "destDate": None
                    }

isoriginDate = False
isdestDate = False

if 'originDate' in origin_dest_date:    
    isoriginDate = True
    if origin_dest_date['originDate'] is not None and \
        not origin_dest_date['originDate'] == '':
        parse(origin_dest_date['originDate'])
    if origin_dest_date['originDate'] == '':
        origin_dest_date['originDate'] = None
if 'destDate' in origin_dest_date:    
    isdestDate = True        
    if origin_dest_date['destDate'] is not None and \
        not origin_dest_date['destDate'] == '':
        parse(origin_dest_date['destDate'])
    if origin_dest_date['destDate'] == '':
        origin_dest_date['destDate'] = None

if isoriginDate and not isdestDate:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and isdestDate:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isoriginDate and origin_dest_date['originDate'] is None and \
    isdestDate and \
        origin_dest_date['destDate'] is not None:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isdestDate and \
    origin_dest_date['destDate'] is None and \
        isoriginDate and \
        origin_dest_date['originDate'] is not None:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and not isdestDate:
    origin_dest_date['originDate'] = None
    origin_dest_date['destDate'] = None

print(origin_dest_date)

>>> date_struc =  {"originDate": None, "destDate": None}

    origin_dest_date_1 =  {"originDate": "2019-06-30 23:59:00.000", "destDate": None}

>>> org_dest(origin_dest_date_1) # test-2 output

    {'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}


>>> origin_dest_date_2 =  {"originDate": "2019-06-30 23:59:00.000"}

>>> org_dest(origin_dest_date_2) #test-2 output

{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

试试这个

>>> def org_dest(d):
      for k,v in d.items():
          date_struc[k]=v
      if all(date_struc.values()):
          pass
      else:
          for k,v in date_struc.items():
              if not v:
                  date_struc[k]= "".join([val for val in date_struc.values() if val])
      return date_struc

最终结构，默认值为

None

，将由函数更新

>>> date_struc =  {"originDate": None, "destDate": None}

测试：

from dateutil.parser import parse

origin_dest_date =  {                        
                        "originDate": "2019-06-30 23:59:00.000",
                        "destDate": None
                    }

isoriginDate = False
isdestDate = False

if 'originDate' in origin_dest_date:    
    isoriginDate = True
    if origin_dest_date['originDate'] is not None and \
        not origin_dest_date['originDate'] == '':
        parse(origin_dest_date['originDate'])
    if origin_dest_date['originDate'] == '':
        origin_dest_date['originDate'] = None
if 'destDate' in origin_dest_date:    
    isdestDate = True        
    if origin_dest_date['destDate'] is not None and \
        not origin_dest_date['destDate'] == '':
        parse(origin_dest_date['destDate'])
    if origin_dest_date['destDate'] == '':
        origin_dest_date['destDate'] = None

if isoriginDate and not isdestDate:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and isdestDate:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isoriginDate and origin_dest_date['originDate'] is None and \
    isdestDate and \
        origin_dest_date['destDate'] is not None:
    origin_dest_date['originDate'] = origin_dest_date['destDate']
elif isdestDate and \
    origin_dest_date['destDate'] is None and \
        isoriginDate and \
        origin_dest_date['originDate'] is not None:
    origin_dest_date['destDate'] = origin_dest_date['originDate']
elif not isoriginDate and not isdestDate:
    origin_dest_date['originDate'] = None
    origin_dest_date['destDate'] = None

print(origin_dest_date)

>>> date_struc =  {"originDate": None, "destDate": None}

    origin_dest_date_1 =  {"originDate": "2019-06-30 23:59:00.000", "destDate": None}

>>> org_dest(origin_dest_date_1) # test-2 output

    {'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}


>>> origin_dest_date_2 =  {"originDate": "2019-06-30 23:59:00.000"}

>>> org_dest(origin_dest_date_2) #test-2 output

{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

如果你只需要两个静态键，你可以试试这个，两行代码

 must = {"originDate", "destDate"}
 test = {"originDate":"2019-06-30 23:59:00.000", "destDate": None}
 test.update({key:test[list(test.keys()-key)[0]] for key in must if key not in test or test[key] is None})

尝试使用一个无值：

test = {"originDate":"2019-06-30 23:59:00.000", "destDate": None} 
test.update({key:test[list(test.keys()-key)[0]] for key in must if key not in test or test[key] is None}) 
test 
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

用一个键尝试：

test = {"originDate":"2019-06-30 23:59:00.000",}
test.update({key:test[list(test.keys()-key)[0]] for key in must if key not in test or test[key] is None})
test
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

如果你只需要两个静态键，你可以试试这个，两行代码

 must = {"originDate", "destDate"}
 test = {"originDate":"2019-06-30 23:59:00.000", "destDate": None}
 test.update({key:test[list(test.keys()-key)[0]] for key in must if key not in test or test[key] is None})

尝试使用一个无值：

test = {"originDate":"2019-06-30 23:59:00.000", "destDate": None} 
test.update({key:test[list(test.keys()-key)[0]] for key in must if key not in test or test[key] is None}) 
test 
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

用一个键尝试：

test = {"originDate":"2019-06-30 23:59:00.000",}
test.update({key:test[list(test.keys()-key)[0]] for key in must if key not in test or test[key] is None})
test
{'originDate': '2019-06-30 23:59:00.000', 'destDate': '2019-06-30 23:59:00.000'}

这是由

d=odd.get（'originDate'）或odd.get（'destDate'）；odd={'originDate'：d，'destDate'：d}

。@deceze但如果两个键都存在，那么最终会覆盖一个。@deceze这在Python中是什么意思？@Aran我认为规范不清楚在这种情况下应该发生什么…@deceze如果两个键都可用，那么它应该返回原样，而不会过度写入

d=odd.get（'originDate'））或奇数。get（'destDate'）；奇数={'originDate'：d，'destDate'：d}

…？@deceze但是如果两个键都存在，你最终会覆盖一个。@deceze这在Python中被称为什么？@Aran我认为规范不清楚在这种情况下会发生什么…@deceze如果两个键都可用，那么它应该返回原样，而不会过度写入

，如果origin不是None，也不是dest

，以缩小范围条件否则，您无法区分空字符串和

None

，这两个值可能是您想要的，也可能不是您想要的。您不需要解析这两个值或将它们保留为文本吗？@GiacomoAlzetta OP说，如果值为None或“empty”，则执行相同的操作，我将其解释为一个空字符串。如果origin不是None，则使用

，如果not dest

，则生成更窄的条件。否则，您无法区分空字符串和

None

，它们可能是您想要的，也可能不是您想要的。您不需要解析这两个值或将它们作为文本保留吗？@GiacomoAlzetta OP说，如果值为None或“empty”，则执行相同的操作，我将其解释为空字符串。

get（键1，None）

可以缩短为

get（key1）

我假设它会引发

KeyError

。谢谢@ababak还有一个：

get（key2，None）

当我开始写这段代码时，只有两个用例。我对第三个用例也做了一些小改动。

get（key1，None）

可以缩短为

get（key1）

我认为它会提高