How to fix UnboundLocalError: local variable 'file_lines' referenced before assignment
How to fix UnboundLocalError: local variable 'file_lines' referenced before assignment
所以这是我的函数，用于从文件中读取文本行。
这是从一个更大的程序中提取的，因此一些评论可能看起来不合适。无论如何我需要在许多其他函数中使用函数 text 和 file_lines 但即使在将它们声明为全局函数之后我仍然得到 UnboundLocalError: local variable 'file_lines' referenced before assignment error 我不知道该怎么做做。
import sys
text = []
case = ''
file_lines = []
def read_file(file): # function to read a file and split it into lines
global text #sets variable text as a global variable for use in multiple locations
global case #handles case sensitivity.
try: #tests the statement after colon
open(file)
except:
print('oops no file found bearing that name')
else:
while file == '': #if the file name is blank print error, this prevents program from crashing
print ('error')
filename = input('enter a file and its extension ie file.ext\n>>')
with open(file) as f : #opens filewith name
text = f.read() #read all lines of program text.
print ("file successfully read")
print('TEXT SENSITIVITY TURNED ON !!!!!!')
text = text.split('\n')# breaks lines in file into list instead of using ".readlines"
# so that the program doesn't count blank lines
case == True
global file_lines
file_lines = text
尝试使用 read_lines 变量的函数将是
def find_words(words):
line_num = 0 # to count the line number
number_of_word = 0
if case == False:
words = words.lower()
file_lines = [file_lines.lower() for file_lines in text]
while "" in file_lines:
file_lines.remove('')
for lines in file_lines:
line_num += 1
if words in lines: #checks each for the words being looks for
print(line_num,"...", text[line_num-1])
number_of_word = 1
if number_of_word == 0: #to check if the word is located in the file
print('Words not found')
在您的函数 find_words 中，您忘记指定 find_lines 是全局的。尝试
def find_words(words):
global file_lines
line_num = 0 # to count the line number
函数错误，因为 file_lines 没有在 find_words 的范围内定义，否则。
所以这是我的函数，用于从文件中读取文本行。
这是从一个更大的程序中提取的，因此一些评论可能看起来不合适。无论如何我需要在许多其他函数中使用函数 text 和 file_lines 但即使在将它们声明为全局函数之后我仍然得到 UnboundLocalError: local variable 'file_lines' referenced before assignment error 我不知道该怎么做做。
import sys
text = []
case = ''
file_lines = []
def read_file(file): # function to read a file and split it into lines
global text #sets variable text as a global variable for use in multiple locations
global case #handles case sensitivity.
try: #tests the statement after colon
open(file)
except:
print('oops no file found bearing that name')
else:
while file == '': #if the file name is blank print error, this prevents program from crashing
print ('error')
filename = input('enter a file and its extension ie file.ext\n>>')
with open(file) as f : #opens filewith name
text = f.read() #read all lines of program text.
print ("file successfully read")
print('TEXT SENSITIVITY TURNED ON !!!!!!')
text = text.split('\n')# breaks lines in file into list instead of using ".readlines"
# so that the program doesn't count blank lines
case == True
global file_lines
file_lines = text
尝试使用 read_lines 变量的函数将是
def find_words(words):
line_num = 0 # to count the line number
number_of_word = 0
if case == False:
words = words.lower()
file_lines = [file_lines.lower() for file_lines in text]
while "" in file_lines:
file_lines.remove('')
for lines in file_lines:
line_num += 1
if words in lines: #checks each for the words being looks for
print(line_num,"...", text[line_num-1])
number_of_word = 1
if number_of_word == 0: #to check if the word is located in the file
print('Words not found')
在您的函数 find_words 中，您忘记指定 find_lines 是全局的。尝试
def find_words(words):
global file_lines
line_num = 0 # to count the line number
函数错误，因为 file_lines 没有在 find_words 的范围内定义，否则。