str转dict时报错：File "", line 1, in NameError: name 'true' is not defined

a = {
    'QQQ': [0.067, 0.167, 0.2, 0.033, 0.233, 0.267, 0.1, 0.133], 
    'TTT': [0.5, 0.375, 0.25, 0.3, 0.6, 0.333, 0.857, 0.636, 0.667, 0.556]

}

　　　用eval转换为字符串时报错：

File "test.py", line 43, in d1
    data = eval(a)
  File "", line 1, in 
NameError: name 'true' is not defined

　　解决：

globals = {
    'true': 0   
}

# -----------
data = eval(a, globals)

若继续报错：

File "test.py", line 43, in d1
    data = eval(a)
  File "", line 1, in 
NameError: name 'false' is not defined

　　解决：

globals = {
    'true': 0,

    'false': 1   
}

# -----------
data = eval(a, globals)