如何不将函数用作其他函数的参数

Question

我正在尝试编写一些函数来确定实根的数量和二次方程的根，我必须使用library(whisker) template <- 'I am {{name}} \n My children are: \n {{#children_names}} Child No {{number}} is {{cname}} {{/children_names}}' data <- list( name = "Chris", children_names = list( list(cname = "Alex", number = 1), list(cname = "John", number = 2) ) ) text <- whisker.render(template, data) cat(text) # I am Chris # # My children are: # # Child No 1 is Alex # Child No 2 is John 函数来完成。我想避免的是使用最终函数将所有其他函数作为其参数，如

main()

相反，我怎样才能看起来像：

def main():
    function4(function3(function2(function1())), function2(function1()))

Answer 1

这应该是等效的。

def main():
    result1 = function1()
    result2 = function2(result1)
    result3 = function3(result2)
    final_result = function4(result3, result2)