Linux终端运行微软机器学习教程Pandas代码无输出求助

Hey there, let's figure out why you're not seeing that numerical table the tutorial promised. Here are the key issues to check and fix:

1. You Defined the Function but Never Called It #

A Python function only runs when you explicitly tell it to. Right now, you've only written the function definition (def sim_log_data(...):), but you haven't triggered its execution. This is the most likely reason you're getting no output.

Fix: #

Add a function call at the end of your code with valid parameters matching the tutorial's example. For instance:

def sim_log_data(x1,y1,n1,sd1,x2,y2,n2,sd2):
    import numpy.random as nr
    import pandas as pd
    # Insert your full data generation logic here (from the tutorial)
    # Example logic to create the table:
    group1 = nr.normal(loc=x1, scale=sd1, size=n1)
    group2 = nr.normal(loc=x2, scale=sd2, size=n2)
    log_df = pd.DataFrame({
        'Group': ['A']*n1 + ['B']*n2,
        'Value': list(group1) + list(group2)
    })
    # Make sure to output the DataFrame
    print(log_df)

# Call the function with sample parameters (adjust to match your tutorial)
sim_log_data(x1=2, y1=0, n1=50, sd1=0.8, x2=5, y2=0, n2=50, sd2=0.8)

2. The Function Doesn't Explicitly Output the Table #

Even if you call the function, if it doesn't print the generated table or return it for you to print, you won't see anything in the terminal.

Fix: #

• Add a print(log_df) statement inside the function (like the example above) to directly output the table when the function runs.
• Or, if you return the DataFrame, print the result of the function call:

  def sim_log_data(...):
      # ... existing code ...
      return log_df
  
  # Print the returned DataFrame
  result = sim_log_data(...)
  print(result)
  

3. Incorrect Execution Method in Linux Terminal #

If you're pasting the entire function directly into a bash shell (not the Python interpreter), bash can't parse Python syntax—this leads to silent failures or confusing errors.

Fix: #

• Use the Python interactive shell: Run python3 in your terminal to enter the Python interpreter, then paste your code (including the function call) and press enter.
• Save as a script: Write your code into a file (e.g., sim_data.py) and run it with python3 sim_data.py in the terminal. This is much more reliable for longer code snippets.

Quick Check: Ensure Your Code is Complete #

Double-check that you copied the full function logic from the tutorial. If the code cuts off mid-implementation (like your snippet shows only the start), the function might not generate the table at all, leading to no output.

内容的提问来源于stack exchange，提问作者Henrique Poleselo