我正在尝试在我的Ubuntu 18.04.4 LTS中安装并运行http命令。
我认为我已经成功安装了http。但是，当我要通过http检查http --version的版本或尝试连接到网站时，说http github.org会得到以下信息：
Traceback (most recent call last):
File "/usr/local/bin/http", line 8, in <module>
sys.exit(main())
File "/usr/local/lib/python2.7/dist-packages/httpie/__main__.py", line 10, in main
from .core import main
File "/usr/local/lib/python2.7/dist-packages/httpie/core.py", line 21
args: List[Union[str, bytes]] = sys.argv,
^
SyntaxError: invalid syntax
这是我的主要 .py的样子：
#!/usr/bin/env python
"""The main entry point. Invoke as `http' or `python -m httpie'.
"""
import sys
def main():
try:
from .core import main
exit_status = main()
except KeyboardInterrupt:
from httpie.status import ExitStatus
exit_status = ExitStatus.ERROR_CTRL_C
sys.exit(exit_status.value)
if __name__ == '__main__':
main()
和python 2.7中的core.py
import argparse
import os
import platform
import sys
from typing import List, Union
import requests
from pygments import __version__ as pygments_version
from requests import __version__ as requests_version
from httpie import __version__ as httpie_version
from httpie.client import collect_messages
from httpie.context import Environment
from httpie.downloads import Downloader
from httpie.output.writer import write_message, write_stream
from httpie.plugins import plugin_manager
from httpie.status import ExitStatus, http_status_to_exit_status
def main(
args: List[Union[str, bytes]] = sys.argv,
env=Environment(),
) -> ExitStatus:
"""
The main function.
Pre-process args, handle some special types of invocations,
and run the main program with error handling.
Return exit status code.
"""
program_name, *args = args
env.program_name = os.path.basename(program_name)
args = decode_raw_args(args, env.stdin_encoding)
plugin_manager.load_installed_plugins()
from httpie.cli.definition import parser
if env.config.default_options:
args = env.config.default_options + args
include_debug_info = '--debug' in args
include_traceback = include_debug_info or '--traceback' in args
if include_debug_info:
print_debug_info(env)
if args == ['--debug']:
return ExitStatus.SUCCESS
exit_status = ExitStatus.SUCCESS
try:
parsed_args = parser.parse_args(
args=args,
env=env,
)
except KeyboardInterrupt:
env.stderr.write('\n')
if include_traceback:
raise
exit_status = ExitStatus.ERROR_CTRL_C
except SystemExit as e:
if e.code != ExitStatus.SUCCESS:
env.stderr.write('\n')
if include_traceback:
raise
exit_status = ExitStatus.ERROR
else:
try:
exit_status = program(
args=parsed_args,
env=env,
)
except KeyboardInterrupt:
env.stderr.write('\n')
if include_traceback:
raise
exit_status = ExitStatus.ERROR_CTRL_C
except SystemExit as e:
if e.code != ExitStatus.SUCCESS:
env.stderr.write('\n')
if include_traceback:
raise
exit_status = ExitStatus.ERROR
except requests.Timeout:
exit_status = ExitStatus.ERROR_TIMEOUT
env.log_error(f'Request timed out ({parsed_args.timeout}s).')
except requests.TooManyRedirects:
exit_status = ExitStatus.ERROR_TOO_MANY_REDIRECTS
env.log_error(
f'Too many redirects'
f' (--max-redirects=parsed_args.max_redirects).'
)
except Exception as e:
# TODO: Further distinction between expected and unexpected errors.
msg = str(e)
if hasattr(e, 'request'):
request = e.request
if hasattr(request, 'url'):
msg = (
f'{msg} while doing a {request.method}'
f' request to URL: {request.url}'
)
env.log_error(f'{type(e).__name__}: {msg}')
if include_traceback:
raise
exit_status = ExitStatus.ERROR
return exit_status
def program(
args: argparse.Namespace,
env: Environment,
) -> ExitStatus:
"""
The main program without error handling.
"""
exit_status = ExitStatus.SUCCESS
downloader = None
try:
if args.download:
args.follow = True # --download implies --follow.
downloader = Downloader(
output_file=args.output_file,
progress_file=env.stderr,
resume=args.download_resume
)
downloader.pre_request(args.headers)
initial_request = None
final_response = None
for message in collect_messages(args, env.config.directory):
write_message(
requests_message=message,
env=env,
args=args,
)
if isinstance(message, requests.PreparedRequest):
if not initial_request:
initial_request = message
else:
final_response = message
if args.check_status or downloader:
exit_status = http_status_to_exit_status(
http_status=message.status_code,
follow=args.follow
)
if (not env.stdout_isatty
and exit_status != ExitStatus.SUCCESS):
env.log_error(
f'HTTP {message.raw.status} {message.raw.reason}',
level='warning'
)
if downloader and exit_status == ExitStatus.SUCCESS:
# Last response body download.
download_stream, download_to = downloader.start(
initial_url=initial_request.url,
final_response=final_response,
)
write_stream(
stream=download_stream,
outfile=download_to,
flush=False,
)
downloader.finish()
if downloader.interrupted:
exit_status = ExitStatus.ERROR
env.log_error(
'Incomplete download: size=%d; downloaded=%d' % (
downloader.status.total_size,
downloader.status.downloaded
))
return exit_status
finally:
if downloader and not downloader.finished:
downloader.failed()
if (not isinstance(args, list) and args.output_file
and args.output_file_specified):
args.output_file.close()
def print_debug_info(env: Environment):
env.stderr.writelines([
f'HTTPie {httpie_version}\n',
f'Requests {requests_version}\n',
f'Pygments {pygments_version}\n',
f'Python {sys.version}\n{sys.executable}\n',
f'{platform.system()} {platform.release()}',
])
env.stderr.write('\n\n')
env.stderr.write(repr(env))
env.stderr.write('\n')
def decode_raw_args(
args: List[Union[str, bytes]],
stdin_encoding: str
) -> List[str]:
"""
Convert all bytes args to str
by decoding them using stdin encoding.
"""
return [
arg.decode(stdin_encoding)
if type(arg) == bytes else arg
for arg in args
]
我的系统中安装了两个版本的python。据我了解，python2.7是预先安装的，并且我已经安装了python 3。
当前，默认的python版本是python 3。
什么可能导致错误？是我的其他python版本还是语法错误？