Printing output in the form of multiple sublist within a list in Python

huangapple
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英文:

Printing output in the form of multiple sublist within a list in Python

问题

  1. sigma_t=[]
  2. alpha_t=[]
  3. for t in range(0,2): 
  4.     temp=[]
  5.     for i in range(0,len(km)): 
  6.         sigma1=sigma0-R*T*0.001*np.log(1+K*Cb*(1-np.exp(-km[i]*t)))
  7.         if sigma1 < threshold_sigma:
  8.             sigma1 = threshold_sigma
  9.         temp.append(sigma1)
  10.     sigma_t.append(temp)
英文:

I am appending all the values to list sigma_t using the loop below. However, I want the values to be within a sublist for each t. I present the current and expected output.

  1. import numpy as np
  2. sigma0=0.021
  3. R=8.314
  4. T=295
  5. K=1.5e3
  6. Cb=0.001
  7. km=[1,2,3,4,5]
  8. threshold_sigma=0.005
  10. sigma_t=[]
  11. alpha_t=[]
  12. for t in range(0,2): 
  13.     for i in range(0,len(km)): 
  14.         sigma1=sigma0-R*T*0.001*np.log(1+K*Cb*(1-np.exp(-km[i]*t)))
  15.         if sigma1 &lt; threshold_sigma:
  16.             sigma1 = threshold_sigma
  17.             
  18.         sigma_t.append(sigma1)
  19.     
  20.         
  21. print(sigma_t)

The current output is

  1. [0.021, 0.021, 0.021, 0.021, 0.021, 0.005, 0.005, 0.005, 0.005, 0.005]

The expected output is

  1. [[0.021, 0.021, 0.021, 0.021, 0.021], [0.005, 0.005, 0.005, 0.005, 0.005]]

答案1

得分: 1

你在第二个循环中向sigma_t列表附加值，然后在代码末尾打印sigma_t。因此，你的所有值都存储在一个名为sigma_t的列表中。

为了使输出与期望的输出匹配，创建一个中间列表，在该列表中插入数据，并在执行第一个循环结束后，将该中间列表插入sigma_t并清空中间列表。

类似于这样：

  1. for t in range(0, 2):
  2.     temp_list = []
  3.     for i in range(0, len(km)):
  4.         sigma1 = sigma0 - R * T * 0.001 * np.log(1 + K * Cb * (1 - np.exp(-km[i] * t)))
  5.         if sigma1 < threshold_sigma:
  6.             sigma1 = threshold_sigma
  7.         temp_list.append(sigma1)
  8.     sigma_t.append(temp_list)
  10. print(sigma_t)
英文:

You're appending values to sigma_t list inside your 2nd for loop, and then at the end of your code you're printing sigma_t. Hence you have all values sitting inside one list sigma_t.

For output to match the expected output, create an intermediate list, insert data in that list, and after you're done executing first for loop, insert that intermediate list in sigma_t and clear the intermediate list.

Something like this

  1. for t in range(0,2):
  2.     temp_list = []
  3.     for i in range(0,len(km)): 
  4.         sigma1=sigma0-R*T*0.001*np.log(1+K*Cb*(1-np.exp(-km[i]*t)))
  5.         if sigma1 &lt; threshold_sigma:
  6.             sigma1 = threshold_sigma
  7.             
  8.         temp_list.append(sigma1)
  9.     sigma_t.append(temp_list)
  10.     
  11.         
  12. print(sigma_t)

huangapple
  • 本文由 发表于 2023年5月22日 18:33:16
  • 转载请务必保留本文链接：https://go.coder-hub.com/76305287.html
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