如何用Python 3.7.5将给定列表输出为无符号表格格式？

Got it, let's get your student data into a clean, brace-free table format—here's exactly how to do it with Python 3.7.5.

First, let's tackle the core problem: stripping out those curly braces and quotes, and structuring the data into a proper table. We'll cover two practical approaches: a simple tab-separated table (great for spreadsheets) and a polished aligned ASCII table (for readability).

Simple Tab-Separated Table #

This is quick, lightweight, and perfect for copying into tools like Excel or Google Sheets:

students = [
    {"grade": 5, "firstname": "Brendon", "lastname": "Urie", "gender": "M"},
    {"grade": 7, "firstname": "Freddy", "lastname": "Mercury", "gender": "M"},
    {"grade": 12, "firstname": "Tessa", "lastname": "Thompson"}
]

# Collect all unique column headers from all student entries
headers = set()
for student in students:
    headers.update(student.keys())
headers = sorted(headers)  # Optional: sort headers alphabetically

# Generate and print the table
print("\t".join(headers))
print("\t".join(["-" * len(header) for header in headers]))

for student in students:
    row = [str(student.get(header, "N/A")) for header in headers]
    print("\t".join(row))

Example Output: #

firstname	grade	lastname	gender
---------	-----	--------	------
Brendon	5	Urie	M
Freddy	7	Mercury	M
Tessa	12	Thompson	N/A

Polished Aligned ASCII Table #

If you want a more visually readable table with neatly aligned columns, use this approach:

students = [
    {"grade": 5, "firstname": "Brendon", "lastname": "Urie", "gender": "M"},
    {"grade": 7, "firstname": "Freddy", "lastname": "Mercury", "gender": "M"},
    {"grade": 12, "firstname": "Tessa", "lastname": "Thompson"}
]

# Get all headers and calculate column widths for perfect alignment
headers = sorted(set(k for student in students for k in student.keys()))
col_widths = [
    max(len(str(student.get(header, ""))) for student in students + [{"dummy": header}])
    for header in headers
]

# Build the table structure
header_line = " | ".join(f"{header:<{col_widths[i]}}" for i, header in enumerate(headers))
separator_line = "-+-".join(["-" * width for width in col_widths])

# Print the finished table
print(header_line)
print(separator_line)
for student in students:
    row_line = " | ".join(
        f"{str(student.get(header, 'N/A')):<{col_widths[i]}}"
        for i, header in enumerate(headers)
    )
    print(row_line)

Example Output: #

firstname | grade | lastname | gender
--------- | ----- | -------- | ------
Brendon   | 5     | Urie     | M
Freddy    | 7     | Mercury  | M
Tessa     | 12    | Thompson | N/A

Integrating with Your output Function #

If your output("list", students, None) is a custom function, you can adapt the code to pass the table as a formatted string instead. For example:

# Build the table into a single string
table_content = [header_line, separator_line]
for student in students:
    row_line = " | ".join(
        f"{str(student.get(header, 'N/A')):<{col_widths[i]}}"
        for i, header in enumerate(headers)
    )
    table_content.append(row_line)
final_table = "\n".join(table_content)

# Replace your original output call with this
output("table", final_table, None)

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