我的CTA 策略有个 tick时间管理模块，加载在temple.py，部分代码如下：
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def __init__(self, size=10):
"""Constructor"""
self.count = 0 # 缓存计数
self.size = size # 缓存大小
self.inited = False # True if count>=size
self.TicklastPriceArray = np.zeros(self.size)
self.TickaskVolume1Array = np.zeros(self.size)
self.TickbidVolume1Array = np.zeros(self.size)
self.TickaskPrice1Array = np.zeros(self.size)
self.TickbidPrice1Array = np.zeros(self.size)
self.TickopenInterestArray = np.zeros(self.size)
self.TickvolumeArray = np.zeros(self.size)
最后加载CTA策略显示：
Traceback (most recent call last):
File "c:\vnstudio\vnpy\lib\site-packages\vnpy\app\cta_strategy\ui\widget.py", line 149, in add_strategy
class_name, strategy_name, vt_symbol, setting
File "c:\vnstudio\vnpy\lib\site-packages\vnpy\app\cta_strategy\engine.py", line 611, in add_strategy
strategy = strategy_class(self, strategy_name, vt_symbol, setting)
File "c:\vnstudio\vnpy\lib\site-packages\vnpy\app\cta_strategy\strategies\AAAAA.py", line 75, in init
self.Tick_arry=TickArrayManager(self.P)
File "c:\vnstudio\vnpy\lib\site-packages\vnpy\app\cta_strategy\template.py", line 442, in init
NameError: name 'np' is not defined
无论我在主策略.py或者temple.py 中加入 import numpy as np，都会报错，急急急
