还有一种方法是使用Python的迭代器来逐行读取文件,并在找到目标行时停止迭代。 def read_specific_line(filename, line_number):withopen(filename,'r')asfile:fori, lineinenumerate(file,start=1):ifi == line_number:returnline specific_line =
“`python def read_specific_lines(file_path, line_numbers): with open(file_path, ‘r’) as file: lines = file.readlines() specific_lines = [lines[line_number – 1] for line_number in line_numbers] return specific_lines “` 上述代码首先使用`open()`函数打开文本文件,然后使用`readlines()...
If you need to read specific lines from a file multiple times, thelinecachemodule is an excellent choice. It allows you to access lines by their line number without reading the entire file into memory. This can be particularly useful for large files where performance is a concern. Here’s ...
# 读取整个文件file=open('example.txt','r')content=file.read()print(content)file.close() 如果文件内容比较大,读取大文件时要注意内存使用,可以使用readline()或readlines()逐行读取。 file=open('example.txt','r')forlineinfile:print(line)file.close() image 1.3 写入文件内容 ...
message -- explanation of why the specific transition is not allowed """ def __init__(self, previous, next, message): self.previous = previous self.next = next self.message = message 大多数的异常的名字都以"Error"结尾,就跟标准的异常命名一样。
#test2_1.py文件 with open("poems.txt",'rt',encoding='UTF-8') as file: str1=file.read(9) #size=9,但只能读取出8个字符 str2=file.read(8) #size=8,但可以读取出8个字符 str3=file.read() #同一个open()函数下,read()已经读取全部文件内容 print("str1:"+str1,"str2:"+str2,"str...
lines.append(line.strip()) Thestrip()method is used to remove the newline character at end of each line, using this can be slow for very large files. 4. List Comprehension – One Liner Solution List comprehension is another way to read a file line-by-line into a list. It allows you...
但是当我尝试指定编码保存时，就出现了这个错误：你只需要做的就是对调用read的结果进行decode，因为默认...
with open('NYOJ_Subjects.csv', 'w', newline='') as file: fileWriter = csv.writer(file) fileWriter.writerow(csvHeaders) fileWriter.writerows(subjects) print('\n题目信息爬取完成!!!') 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Python逐行读取文件内容thefile= open("foo.txt") line = thefile.readline() while line: print line, line = thefile.readline() thefile.close()Windows下文件