python 字典转化数据框报错：If using all scalar values, you must pass an index
方法1
a={'python': 2, 'java': 1, 'flask': 2, 'django': 1}
b=pd.DataFrame.from_dict([a]).T
b=b.reset_index()
方法2
a={'python': 2, 'java': 1, 'flask': 2, 'django': 1}
b=pd.DataFrame.from_dict(a,orient='index')
b=b.reset_index()
