python打印前50行
时间: 2023-10-13 12:12:13 浏览: 22
以下是Python打印前50行的代码:
```
with open('filename.txt') as f:
for i in range(50):
print(f.readline())
```
请注意,这只是一个示例,您需要将“filename.txt”替换为您要打印前50行的实际文件名。
相关问题
Python打印前五行
要打印文件的前五行,你可以使用以下代码:
```python
with open('文件名.txt', 'r') as file:
lines = file.readlines()
for i in range(5):
print(lines[i])
```
请将'文件名.txt'替换为你要打印的文件的实际名称。这段代码将打开文件并逐行读取内容存储在列表中,然后循环打印前五行的内容。
Python打印杨辉三角前十行
好的,以下是Python代码实现杨辉三角前十行的打印:
```python
n = 10
triangle = [[1], [1, 1]]
for i in range(2, n):
row = [1]
for j in range(1, i):
row.append(triangle[i-1][j-1] + triangle[i-1][j])
row.append(1)
triangle.append(row)
for row in triangle:
print(row)
```
输出结果为:
```
[1]
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
[1, 5, 10, 10, 5, 1]
[1, 6, 15, 20, 15, 6, 1]
[1, 7, 21, 35, 35, 21, 7, 1]
[1, 8, 28, 56, 70, 56, 28, 8, 1]
[1, 9, 36, 84, 126, 126, 84, 36, 9, 1]
```