Python 创建调用自身的函数的最佳方法
创建基于条件调用自身的函数的最佳方法是什么？例如，我有一个字典变量“table”，其中包含文本（value）元数据（key），另一个变量包含比较文本“line”。我需要写一个程序，将数据从行和匹配它与“表”值。如果匹配成功，则应输出“表键+行”，否则将从“行”中删除最后一个字并执行相同的操作。表变量和行变量示例如下所示： 表格变量：Python 创建调用自身的函数的最佳方法,python,python-3.x,Python,Python 3.x,创建基于条件调用自身的函数的最佳方法是什么？例如，我有一个字典变量“table”，其中包含文本（value）元数据（key），另一个变量包含比较文本“line”。我需要写一个程序，将数据从行和匹配它与“表”值。如果匹配成功，则应输出“表键+行”，否则将从“行”中删除最后一个字并执行相同的操作。表变量和行变量示例如下所示： 表格变量： {'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Addition
{'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Additions based on tax
positions related to the They believe that it is reasonably possible that approximately $40 million of
its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute
of limitations or resolution with the tax authorities.', [Base Font : IOFOEO+Imago-Book, Font Size : 6.84,
Font Weight : 0.0]': 'Additions based on tax positions related to prior'}
Additions based on tax positions related to the Additions based on tax positions related to prior Bunge
believes that it is reasonably possible that approximately $40 million of its unrecognized tax benefits
may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution
with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the Additions based on tax positions related to prior They believe that it is reasonably
possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of
2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the [Base Font : IOFOEO+Imago-Book, Font Size : 6.84, Font Weight : 0.0]Additions based on tax
positions related to prior [Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]They believe that it
is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized
by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
{'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Additions based on tax
positions related to the They believe that it is reasonably possible that approximately $40 million of
its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute
of limitations or resolution with the tax authorities.', [Base Font : IOFOEO+Imago-Book, Font Size : 6.84,
Font Weight : 0.0]': 'Additions based on tax positions related to prior'}
Additions based on tax positions related to the Additions based on tax positions related to prior Bunge
believes that it is reasonably possible that approximately $40 million of its unrecognized tax benefits
may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution
with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the Additions based on tax positions related to prior They believe that it is reasonably
possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of
2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the [Base Font : IOFOEO+Imago-Book, Font Size : 6.84, Font Weight : 0.0]Additions based on tax
positions related to prior [Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]They believe that it
is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized
by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
with open("myfile1.txt","r", encoding='utf-8') as f, open("myfile2.txt","w") as f1:
for line in f:
if line.strip():
words = " ".join(line.split())
for i in table:
if words in table[i]:
f1.write(i+line)
break
else:
pass
else:
line_split = line.split()
remaining_itemlist = []
while len(line_split)>0:
for i in table:
words = " ".join(line_split[:len(line_split)])
if words in table[i]:
f1.write(i+words)
new_word = words.split()
for i in range(len(new_word)):
line_split.pop(0)
for i in table:
if " ".join(remaining_itemlist) in table[i]:
f1.write(i+" ".join(remaining_itemlist))
break
break
else:
pass
else:
remaining_itemlist.insert(0, line_split.pop(-1))
else:
f1.write(line)
{'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Additions based on tax
positions related to the They believe that it is reasonably possible that approximately $40 million of
its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute
of limitations or resolution with the tax authorities.', [Base Font : IOFOEO+Imago-Book, Font Size : 6.84,
Font Weight : 0.0]': 'Additions based on tax positions related to prior'}
Additions based on tax positions related to the Additions based on tax positions related to prior Bunge
believes that it is reasonably possible that approximately $40 million of its unrecognized tax benefits
may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution
with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the Additions based on tax positions related to prior They believe that it is reasonably
possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of
2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the [Base Font : IOFOEO+Imago-Book, Font Size : 6.84, Font Weight : 0.0]Additions based on tax
positions related to prior [Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]They believe that it
is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized
by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
{'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Additions based on tax
positions related to the They believe that it is reasonably possible that approximately $40 million of
its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute
of limitations or resolution with the tax authorities.', [Base Font : IOFOEO+Imago-Book, Font Size : 6.84,
Font Weight : 0.0]': 'Additions based on tax positions related to prior'}
Additions based on tax positions related to the Additions based on tax positions related to prior Bunge
believes that it is reasonably possible that approximately $40 million of its unrecognized tax benefits
may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution
with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the Additions based on tax positions related to prior They believe that it is reasonably
possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of
2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]Additions based on tax positions
related to the [Base Font : IOFOEO+Imago-Book, Font Size : 6.84, Font Weight : 0.0]Additions based on tax
positions related to prior [Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]They believe that it
is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized
by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.
我已经写了一些简单的代码，可以通过必要的编辑替换为您的代码
line='there is some line which is needed to be checked'
your_dict = {'key1':'there is some line','key2':'it is not','key3':'not even this'}
def check_the_match(line):
flag=0
for k in your_dict.keys():
if line in your_dict[k]:
flag=1
print(k+line)
if flag==0:
print('Checking again')
new_line = " ".join(line.split()[:-1])
check_the_match(new_line)
check_the_match(line)
Checking again
Checking again
Checking again
Checking again
Checking again
Checking again
key1there is some line
我已经写了一些简单的代码，可以通过必要的编辑替换为您的代码
line='there is some line which is needed to be checked'
your_dict = {'key1':'there is some line','key2':'it is not','key3':'not even this'}
def check_the_match(line):
flag=0
for k in your_dict.keys():
if line in your_dict[k]:
flag=1
print(k+line)
if flag==0:
print('Checking again')
new_line = " ".join(line.split()[:-1])
check_the_match(new_line)
check_the_match(line)
Checking again
Checking again
Checking again
Checking again
Checking again
Checking again
key1there is some line
我正在添加另一段代码： 请确保增加递归限制，因为python的递归限制较低。 您可以使用sys库处理递归限制 我是根据我对问题的理解做出的，道歉是错误的
import sys
sys.setrecursionlimit(1000)
dictionary={
'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Additions based on tax positions related to the They believe that it is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.',
'[Base Font : IOFOEO+Imago-Book, Font Size : 6.84, Font Weight : 0.0]': 'Additions based on tax positions related to prior'
}
line ='Additions based on tax positions related to the Additions based on tax positions related to prior Bunge believes that it is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.'
def check_the_match(line):
for k in dictionary.keys():
if line in dictionary[k]:
print(k+dictionary[k])
# trimming the line
new_line = " ".join(line.split(' ')[:-1])
if len(new_line.split(' ')[:-1])>1:
check_the_match(new_line)
check_the_match(line)
我正在添加另一段代码： 请确保增加递归限制，因为python的递归限制较低。 您可以使用sys库处理递归限制 我是根据我对问题的理解做出的，道歉是错误的
import sys
sys.setrecursionlimit(1000)
dictionary={
'[Base Font : IOHLGA+Trebuchet, Font Size : 3.768, Font Weight : 0.0]': 'Additions based on tax positions related to the They believe that it is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.',
'[Base Font : IOFOEO+Imago-Book, Font Size : 6.84, Font Weight : 0.0]': 'Additions based on tax positions related to prior'
}
line ='Additions based on tax positions related to the Additions based on tax positions related to prior Bunge believes that it is reasonably possible that approximately $40 million of its unrecognized tax benefits may be recognized by the end of 2019 as a result of a lapse of the statute of limitations or resolution with the tax authorities.'
def check_the_match(line):
for k in dictionary.keys():
if line in dictionary[k]:
print(k+dictionary[k])
# trimming the line
new_line = " ".join(line.split(' ')[:-1])
if len(new_line.split(' ')[:-1])>1:
check_the_match(new_line)
check_the_match(line)
嗨@Abhinav，你的代码也有一些缺陷，不能满足我的需要。你可以修改你的输入，或者只是使用我的，然后尝试你的代码。然而，您的代码确实给了我一个如何从函数本身调用函数的想法。我创建它只是为了给出一个想法：）。。这就是为什么我写了“必要的编辑”同意，我确实做了一些修改。这没有帮助。问题是，考虑到复杂性，我的代码变得如此冗长。这就是我在这里寻求帮助的原因。嗨@Abhinav，你的代码也有一些缺陷，不能满足我的需要。你可以修改你的输入，或者只是使用我的，然后尝试你的代码。然而，您的代码确实给了我一个如何从函数本身调用函数的想法。我创建它只是为了给出一个想法：）。。这就是为什么我写了“必要的编辑”同意，我确实做了一些修改。这没有帮助。问题是，考虑到复杂性，我的代码变得如此冗长。这就是我在这里寻求帮助的原因。你能澄清一下你到底在问什么吗？“调用自身的函数”（通常称为“递归函数”）实际上就是这样做的，即它调用自身。这只是定义名称（…）：名称（…）。这方面没有任何变化，因此没有“最佳方法”，只有一个明显的方法。你认为什么样的变体会有一个“最佳”的解决方案，什么是你“最佳”的标准？我在给定的例子中使用了最好的方法。我无法递归调用函数以生成预期的输出。我很确定给定代码中唯一需要的更改是递归调用函数。然而，由于我是编程新手，我不确定。正如您所提到的，我已经调用了这个函数，但仍然远远没有得到预期的输出。是否有其他可能的解决方案来获得预期的输出？显示的代码是一个格式稍有错误的语句集合。你能澄清一下你打算把什么部分变成递归函数吗？第23行。我认为会有else语句调用函数以获得所需的输出。你能告诉我你觉得哪个部分变形了吗？有没有哪行代码我们可以跳过或做得更好？你能澄清你到底在问什么吗？“调用自身的函数”（通常称为“递归函数”）实际上就是这样做的，即它调用自身。这只是定义名称（…）：名称（…）。这方面没有任何变化，因此没有“最佳方法”，只有一个明显的方法。你认为什么样的变体会有一个“最佳”的解决方案，什么是你“最佳”的标准？我在给定的例子中使用了最好的方法。我无法递归调用函数以生成预期的输出。我很确定给定代码中唯一需要的更改是递归调用函数。然而，由于我是编程新手，我不确定。正如您所提到的，我已经调用了这个函数，但仍然远远没有得到预期的输出。是否有其他可能的解决方案来获得预期的输出？显示的代码是一个格式稍有错误的语句集合。你能澄清一下你打算把什么部分变成递归函数吗？第23行。我认为会有else语句调用函数以获得所需的输出。你能告诉我你觉得哪个部分变形了吗？有哪行代码我们可以跳过或做得更好？