如何将Python计算表达式转换为可复制的目标字符串形式？

Got it, let's fix this so you get the exact string (10+20)*cos(u) instead of the numeric calculation result!

The issue with your original code is that you're evaluating the mathematical expression first (calculating (A+B)*cos(u) as a numeric value/array) and then printing that result. Instead, you need to construct the string representation of the expression without computing it.

Here's the straightforward solution using Python's f-strings (which make string formatting super clean):

A = 10
B = 20
# Build the expression string using f-string interpolation
expression = f"({A}+{B})*cos(u)"
print(expression)

Running this will output exactly what you need:

(10+20)*cos(u)

Bonus tip: #

If you ever change the values of A or B later, this code will automatically update the expression string to match the new values. For example, if you set A=15 and B=25, it'll output (15+25)*cos(u) without you having to manually edit the string.

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