python - 为什么我在 IF 语句后立即在 Python REPL 中收到无效语法错误？

Question

我认为这是完全正确的。

if False:
    print(1)
print(2)

但是，它在 Python REPL 中给我一个无效的语法错误。

这是为什么？

在 Python 3.6.5 (x64)、Windows 10 RS4 上

Answer 1

正如 user2357112 所指出的，这种行为在 https://docs.python.org/3/tutorial/introduction.html#first-steps-towards-programming 中有解释。 ,

The body of the loop is indented: indentation is Python’s way of grouping statements. At the interactive prompt, you have to type a tab or space(s) for each indented line. In practice you will prepare more complicated input for Python with a text editor; all decent text editors have an auto-indent facility. When a compound statement is entered interactively, it must be followed by a blank line to indicate completion (since the parser cannot guess when you have typed the last line). Note that each line within a basic block must be indented by the same amount.