python 3.6.5出现语法错误

我正在努力学习python，由于某些原因，我不断地遇到语法错误。当我复习时，我看不出有什么错

操作系统版本：

[root@localhost python3.6]# cat /etc/*release
CentOS Linux release 7.5.1804 (Core) 

版本：

[root@localhost python3.6]#  python3.6 -V
Python 3.6.5

Python脚本： [root@localhostpython3.6]#cat ex8.py

formatter = "{} {} {} {}" 

print(formatter.format(1, 2, 3, 4))
print(formatter.format("one", "two", "three", "four")
print(formatter.format(True, False, False, True)) 
print(formatter.format(formatter, formatter, formatter, formatter)) 
print(formatter.format(
"Bing",
"Bong", 
"Bang", 
"Bung"
))

Python错误：

[root@localhost python3.6]# python3.6 ex8.py 
  File "ex8.py", line 5
    print(formatter.format(True, False, False, True)) 
        ^
SyntaxError: invalid syntax

---

前一行缺少右括号：

print(formatter.format("one", "two", "three", "four"))
# This was missing ----------------------------------^

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在出现错误之前，数一数你的括号。谢谢！我想我在修复其他语法错误时忽略了这一点。