.sleep!: Float => NoneType
.time!: () => Float

.StructTime = 'struct_time': ClassType
.StructTime.
    tm_year: Nat
    tm_mon: Nat
    tm_mday: Nat
    tm_hour: Nat
    tm_min: Nat
    tm_sec: Nat
    tm_wday: Nat
    tm_yday: Nat
    tm_isdst: Nat
    tm_zone: Str
    tm_gmtoff: Nat