如何添加到文件而不是替换

所以我希望能够将这段代码添加到 Suggestions.txt 而不是替换已有的内容（即现有内容下方的两行）

input1 = input("What is your name?:  ")

input2 = input("What is your suggestion for another issue to be solved:  ")

input3 = input("Do you know how to solve this issue? If not press enter:  ")

input4 = input("What keywords would the user need to use to access the solution? \n Press enter to leave blank:  ")

file = open("Suggestions.txt", "w")

file.write("Name: " +input1 + "\n")

file.write("Suggestion: " +input2 + "\n")

file.write("Solution: " +input3 + "\n")

file.write("Keywords: " +input4 + "\n")

file.close()

这样多人就可以写下他们的建议，而不会被下一个人覆盖。

我希望它会自动添加到下面，而在另一个线程中似乎并非如此。