[-1,-2,-3,-4,0,1,2,3]print(filter_nat(nums)) # [0, 1, 2, 3] 不过,按值迭代更简单;您只需要使用值本身,而不是试图将其用作索引: def filter_nat(nums): flist = [] for i in nums: if i >=0: flist.append(i) return flist nums = [-1,-2,-3,-4,0,1,2,3]print(...
Python使用split()将字符串转为list。 split(self, /, sep=None, maxsplit=-1) Return a list of the substrings in the string, using sep as the separator string. sep The separator used to split the string. When set to None (the default value), will split on any whitespace character (incl...
54 55 """ 56 return (sep or ' ').join(x.capitalize() for x in s.split(sep)) 57 58 59 # Construct a translation string 60 _idmapL = None 61 def maketrans(fromstr, tostr): 62 """maketrans(frm, to) -> string 63 64 Return a translation table (a string of 256 bytes long) ...
In this code block, we first define a listmy_listcontaining three strings: “apple”, “banana”, and “cherry”. Then, we use theinoperator to check if “banana” is present inmy_list. If it is, the code inside theifstatement is executed, printing “Found!” to the console. 2. U...
1 """A collection of string operations (most are no longer used). 2 3 Warning: most of the code you see here isn't normally used nowadays. 4 Beginning with Python 1.6, many of these functions are implemented as 5 methods on the standard string object. They used to be implemented ...
Here, we will create the example Python list of string values that will be used in the examples in this tutorial. So, in your Python programming IDE, run the code below to create the example Python list of strings:my_list = ["car", "radio", "wheels", "bicycle"] print(my_list) #...
resultofany object literal decodedwithan ordered listofpairs.Thereturnvalueof``object_pairs_hook``will be used insteadofthe``dict``.This feature can be used to implement custom decoders that rely on the order that the key and value pairs aredecoded(forexample,collections.OrderedDict will remembe...
defspam():"""This is a multiline comment to help explain what thespam()functiondoes."""print('Hello!') 索引和切片字符串 字符串和列表一样使用索引和切片。您可以将字符串'Hello, world!'视为一个列表,并将字符串中的每个字符视为一个具有相应索引的项。
To add an item to the end of a list, we can use the list append() method. For example, fruits = ['apple', 'banana', 'orange'] print('Original List:', fruits) fruits.append('cherry') print('Updated List:', fruits) Run Code Output Original List: ['apple', 'banana', 'orange...
PythonUserPythonUserProvide a list of stringsConfirm receiptSpecify the string to filterConfirm receiptRequest filtered stringsFilter the stringsReturn filtered strings 在上面的序列图中,用户首先提供一个字符串列表给Python。Python确认收到列表后,用户指定要过滤的字符串。然后,用户请求过滤后的字符串,Python进行...