需要注意,remove方法没有返回值,而且如果删除的元素不在列表中的话,会发生报错。 代码语言:python 代码运行次数:0 运行 AI代码解释 >>>lst=[1,2,3]>>>lst.remove(4)Traceback(most recent call last):File"<stdin>",line1,in<module>ValueError:list.remove(x):xnotinlist pop L.pop(index) -> item...
f.seek(0)#因为W+读取文件之后会定位在文件尾部,所以需要重新定位一下光标位置,要不无法读取print("定位之后的光标位置:%s"%(f.tell()))i=f.read()print(i)f.close()#关闭文件夹输出:C:\Python35\python.exeD:/linux/python/all_test/listandtup.py定位之前的光标位置:17定位之后的光标位置:0我要学Pyt...
Usestr.join()andsplit()to Remove a Newline Character From the String in Python Python’s string manipulation capabilities extend further with the combination of thestr.join()andstr.split()methods. Thestr.join()method concatenates elements of an iterable, such as a list, into one string. On...
print(dup_items) -> This line prints the 'dup_items' set to the console using the print() function. The expected output would be {40, 10, 80, 50, 20, 60, 30} Flowchart: For more Practice: Solve these Related Problems: Write a Python program to remove duplicates from a list while ...
# Deleting 'fish' elementanimals.remove('fish') # Updated animals Listprint('Updated animals list: ', animals) Run Code Output Traceback (most recent call last): File ".. .. ..", line 5, in <module> animal.remove('fish')
remove(5)) print("Updated List:") print(aList) Let us compile and run the program, the output is produced as follows −Traceback (most recent call last): File "main.py", line 2, in print("Element Removed : ", aList.remove(5)) ValueError: list.remove(x): x not in list ...
Traceback (most recent call last): File ".. .. ..", line 5, in <module> animal.remove('fish') ValueError: list.remove(x): x not in list 在这里,我们收到一个错误,因为animals列表不包含'fish'。 如果需要根据索引删除元素(如第四个元素),可以使用...
给remove()方法传入一个值,它将从被调用的列表中删除。>>> a.remove('cat') >>> a ['dog', 'fish', 'pig', 'bird'] Tips:如果知道想要删除的值在列表中的下标,del语句就很好用。如果知道想要从列表中删除的值,remove()方法就很好用。排序数值的列表或字符串的列表,能用sort()方法排序。
line=f.readline() print('Read line:%s'%line) f.close() 结果: Name of file test.log Read line:# Assuming file has following5lines Read line:# Thisis1st line 其它 numList = [1,2,2,23,4,5] strList= ['a','b','c','d','e'] ...
4. Remove all the elements from the list Python provides a method to empty the entire list in a single line. # List of integers lis = [3, 1, 4, 1, 5, 9, 2, 6, 5] # Removing all elements lis.clear() # Printing the list ...