小编Geo*_*fer的帖子

不知道该怎么办

安装旧版本的 python 很困难

Traceback (most recent call last):
  File "/home/g/.local/bin/cairo-compile", line 7, in <module>
    from starkware.cairo.lang.compiler.cairo_compile import main  # noqa
  File "/home/g/.local/lib/python3.10/site-packages/starkware/cairo/lang/compiler/cairo_compile.py", line 9, in <module>
    from starkware.cairo.lang.compiler.assembler import assemble
  File "/home/g/.local/lib/python3.10/site-packages/starkware/cairo/lang/compiler/assembler.py", line 7, in <module>
    from starkware.cairo.lang.compiler.program import CairoHint, Program
  File "/home/g/.local/lib/python3.10/site-packages/starkware/cairo/lang/compiler/program.py", line 25, in <module>
    from starkware.starkware_utils.marshmallow_dataclass_fields import IntAsHex
  File "/home/g/.local/lib/python3.10/site-packages/starkware/starkware_utils/marshmallow_dataclass_fields.py", line 6, in <module>
    from frozendict import frozendict
  File "/home/g/.local/lib/python3.10/site-packages/frozendict/__init__.py", line 16, in <module>
    class frozendict(collections.Mapping):
AttributeError: module 'collections' has no attribute 'Mapping'

当我在 for..of 构造中使用字符串来循环字母时，打字稿会抛出错误。为什么？我该如何修复它？这是一个重现的示例：

forOf.ts

for (let letter of \'string\') {\n  console.log(letter);\n}\n\n

\xe2\x9e\x9c  ch5_HOF tsc forOf.ts \nforOf.ts:1:20 - error TS2494: Using a string in a \'for...of\' statement is only supported in ECMAScript 5 and higher.\n\n1 for (let letter of \'string\') {\n                     ~~~~~~~~\n\n\nFound 1 error.\n