[英]Pretty print Python dictionary from command line
我可以從命令行輕松打印JSON:
$ echo '{"hello": "world"}' |python -mjson.tool
{
"hello": "world"
}
但是,它不適用於Python字典(顯然):
$ echo "{'hello': None}" |python -mjson.tool
Expecting property name: line 1 column 1 (char 1)
我是否可以使用一些類似於json.tool
內置類來漂亮地打印Python數據結構?
如果您確實需要命令行解決方案,則可以在命令行中使用pprint
庫 :
$ echo "{'python': {'hello': [1,2,3,4,42,81,113,256], 'world': ['spam', 'ham', 'eggs', 'bacon', 'eric', 'idle']}}" \
| python -c 'import sys; from pprint import pprint as pp; pp(eval(sys.stdin.read()))'
{'python': {'hello': [1, 2, 3, 4, 42, 81, 113, 256],
'world': ['spam', 'ham', 'eggs', 'bacon', 'eric', 'idle']}}
這很容易包裝在模塊中。 將此pprint_tool.py
:
import sys
import ast
from pprint import pprint
def main():
if len(sys.argv) == 1:
infile = sys.stdin
outfile = sys.stdout
elif len(sys.argv) == 2:
infile = open(sys.argv[1], 'rb')
outfile = sys.stdout
elif len(sys.argv) == 3:
infile = open(sys.argv[1], 'rb')
outfile = open(sys.argv[2], 'wb')
else:
raise SystemExit(sys.argv[0] + " [infile [outfile]]")
with infile:
try:
obj = ast.literal_eval(infile.read())
except ValueError as e:
raise SystemExit(e)
with outfile:
pprint(obj, outfile)
if __name__ == '__main__':
main()
這將像json.tool
模塊一樣工作:
echo "..." | python -m pprint_tool
這個項目是解決這個問題的好方法:
https://github.com/wolever/pprintpp
從自述文件:
$ pip install pprintpp
$ echo "{'hello': 'world'}" | pypprint
{'hello': 'world'}
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