英文:

Python .ipynb file prints output to the terminal without print function .py doesnt

问题

我正在实现一个样本概率密度函数。尽管我的代码中没有打印函数，但它会从我的值中打印样本输出。我使用的是.ipynb文件，当我将代码复制到.py文件中时，就不会打印出来。我不明白问题出在哪里。以下是我的代码：

```python
import numpy as np

def gen_b():
    
    samples = []
    num_samples = 10000
    
    while len(samples) < num_samples:
        b = np.random.random() * 6
        y = np.random.random()
        if y <= pdf_b(b):
            samples.append(b)
    
    return samples

gen_b()

pdf_b(x) 是一个简单的 f(x) = y 函数，在其中没有打印函数。

我该如何解决这个问题？我不想让样本输出被打印出来。以下是我不想被打印的输出：

[2.140133171853366,
 3.782237422460611,
 4.252458824774285,
 1.9767482772032179,
 2.250855035249897,
 4.788930465436959,
 1.9076515188916072,
 2.745557799097914,
 3.620720920902893,
 2.540311807348857,
 3.3786579434452295,
 4.654430681635432,
 3.885627334171001,
 3.03255430392689,
 2.078660750831954,
 1.563168692059776,
 4.066738029089566,
 4.173320782327262,
 2.3957708748717117,
 2.392456670794856,
 2.0479422380490147,
 3.0472011553416785,
 1.2691569709730193,
 2.930679937209872,
 3.0627475835692044,
...
 2.3660255564569264,
 2.3079729976179957,
 2.8430403284524752,
 3.9573097908844583,
 ...]

<details>
<summary>英文:</summary>

I am implementing a sample probability density function. Although there is no print function in my code it prints sample output from my value. I use .ipynb file, and when i copy the code into .py file, it is not printed. I don&#39;t understand where is the problem. Here is my code:

import numpy as np

def gen_b():

samples = []
num_samples = 10000

while len(samples) < num_samples:
    b = np.random.random() * 6
    y = np.random.random()
    if y <= pdf_b(b):
        samples.append(b)

return samples

gen_b()

`pdf_b(x)` is a simple `f(x) = y`  function, there is no printing function inside of it.

How can i solve the problem? I don't want to sample output is printed. Here is the output that I don't want to be printed: 

[2.140133171853366,
3.782237422460611,
4.252458824774285,
1.9767482772032179,
2.250855035249897,
4.788930465436959,
1.9076515188916072,
2.745557799097914,
3.620720920902893,
2.540311807348857,
3.3786579434452295,
4.654430681635432,
3.885627334171001,
3.03255430392689,
2.078660750831954,
1.563168692059776,
4.066738029089566,
4.173320782327262,
2.3957708748717117,
2.392456670794856,
2.0479422380490147,
3.0472011553416785,
1.2691569709730193,
2.930679937209872,
3.0627475835692044,
...
2.3660255564569264,
2.3079729976179957,
2.8430403284524752,
3.9573097908844583,
...]
Output is truncated. View as a scrollable element or open in a text editor. Adjust cell output settings...

答案1

得分: 2

IPython是一个REPL，即一个读取、评估、打印循环。最后被评估的语句是gen_b()，所以该值被打印出来。如果你不想打印它，你可以简单地将结果赋值给某个变量，即使是一个临时变量，_ = gen_b()（或者在REPL中不运行它）。

英文:

IPython is a REPL, a read, evaluate, print loop. The last statement that is evaluated is gen_b(), so the value is printed. If you don't want it printed, one thing you can do is to simply assign the result to something, even a throwaway variable, _ = gen_b() (or just don't run it in a REPL).