You can use any of the following methods to remove an item from a list. In the first case, we can use theremove()function. # Initialize a list with integers from 1 to 5my_list=[1,2,3,4,5] # Remove the element with the value 5 from the listmy_list.remove(5) ...
... del numbers[i] # BAD: Deleting item from alistwhileiterating over it ... Traceback (most recent call last): File"", line2, in IndexError:listindex out of range 有经验的程序员都知道,在Python中遍历列表或数组时不应该删除该列表(数组)中的元素。虽然上面代码的错误很明显,但是在编写复杂...
>>> odd = lambda x : bool(x % 2) >>> numbers = [n for n in range(10)] >>> for i in range(len(numbers)): ... if odd(numbers[i]): ... del numbers[i] # BAD: Deleting item from a list while iterating over it ... Traceback (most recent call last): File "<stdin>...
... if odd(numbers[i]): ... del numbers[i] # BAD: Deleting item from a list while iterating over it ... Traceback (most recent call last): File "<stdin>", line 2, in <module> IndexError: list index out of range 1. 2. 3. 4. 5. 6. 7. 8. 9. 在遍历列表或数组的同时...
精通Python 系统管理脚本编程(一) 原文:zh.annas-archive.org/md5/c33d6613eafa4d86b92059a00f7aa16f 译者:飞龙 协议:CC BY-NC-SA 4.0 前言 Python 已经发展并扩展了其功能,涵盖了几乎所有可能的 IT 操作。本书将
listName.insert(position,item / element) Insert()使用两个参数 - position和list item。该位置是元素需要保留在列表中的位置。这些位置通常称为索引。通常,python中的列表索引从0开始。(即第一个元素索引为0,第二个元素为1,第三个元素索引为2,依此类推)。由此,我们可以得出结论: ...
# Deleting a key/value pair del ab['Spammer'] print '\nThere are %d contacts in the address-book\n' % len(ab) for name, address in ab.items(): print 'Contact %s at %s' % (name, address) if 'Guido' in ab: # OR ab.has_key('Guido') ...
由于python3.x系列不再有 raw_input函数,3.x中 input 和从前的 raw_input 等效,把raw_input换成input即可。 SyntaxError: multiple statements found while compiling a single statement 这是因为整体复制过去运行而产生的错误;解决方案如下: 方法一:先将第一行复制,敲一下回车,再将剩下的部分复制过去,运行; ...
min_itemsize: 'int | dict[str, int] | None' = None, nan_rep=None, dropna: 'bool_t | None' = None, data_columns: 'bool_t | list[str] | None' = None, errors: 'str' = 'strict', encoding: 'str' = 'UTF-8') -> 'None' Write the contained data to an HDF5 file using ...
... del numbers[i] # BAD: Deleting item from a list while iterating over it ... Traceback (most recent call last): File "<stdin>", line 2, in <module> IndexError: list index out of range 在遍历的时候,对列表进行删除操作,这是很低级的错误。稍微有点经验的人都不会犯。 对上面的代...