类型错误：不支持的格式字符串传递给 tuple.__format__

Question

I want to display this:

---

Number Name

1 Jane

2 Linda

3 Vladimir

---

but when I put row in the last line its giving me an error.

output = cursor.fetchall()

for row in output:
    print("{0:20}\t{1:20}".format("Number", "Name"))
    print("{0:20}\t{1:20}".format(row, row[0]))

Answer 1

Based on my limited testing, Python's f-strings and .format (tested with 3.8) do not support strings like "{:2}".format([0]) (ie with arguments of list type). If you do need a list printed out, convert it to str :

rows = [[1, "Jane"], [2, "Linda"], [3, "Vladimir"]]
print("{0:16}{1:8}".format("Number", "Name"))
for row in rows:
    print("{0:<16}{1:8}".format(str(row), row[1]))

Or just pass each element separately:

rows = [[1, "Jane"], [2, "Linda"], [3, "Vladimir"]]
print("{0:8}{1:8}".format("Number", "Name"))
for row in rows:
    print("{0:<8}{1:8}".format(row[0], row[1]))