我没有答对这个问题。函数read_words
将新行中包含一堆名称的文本文件转换为一个列表,然后就可以工作了。你知道吗
def read_words(words_file):
""" (file open for reading) -> list of str
Return a list of all words (with newlines removed) from open file
words_file.
Precondition: Each line of the file contains a word in uppercase characters
from the standard English alphabet.
"""
words_list = []
words = words_file.readlines()
for i in range(len(words)):
new_word = words[i]
for char in '\n':
new_word = new_word.replace(char,'')
words_list.append(new_word)
return words_list
当我尝试获取列表列表时,问题就出现了
def read_board(board_file):
""" (file open for reading) -> list of list of str
Return a board read from open file board_file. The board file will contain
one row of the board per line. Newlines are not included in the board.
"""
board_list = []
row_list = []
rows = read_words(board_file)
for i in range(len(rows)):
for char in rows[i]:
row_list.append(char)
board_list.append(row_list)
return board_list
目标是打开以下类型的文本文件:
ABCD
EFGH
变成[['A','B','C','D'],['E','F','G','H']]
我已经尝试过不走运地使用board_list.append(row_list)
调用的索引。我怎样才能让它工作?你知道吗
你可以用list comprehension和^{} 这样做:
代码:
测试代码:
结果:
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