Python while错误

from exAdd import AddInformation
from exFind import FindInformation
print("|---欢迎进入Python通讯录---|")
print("|-----1.查询联系人资料-----|")
print("|------2.添加新联系人------|")
print("|-------3.退出通讯录-------|")
a=int(input("输入数字执行相应功能:")
while True:                 #SyntaxError:invalid syntax
    if a==1:
        AddInformation
    elif a==2:
        FindInformation
    else:
        break

def AddInformation():
    try:
        file=open("temp.txt","r+")
        pb=eval(file.readline())
        file.seek(0)
        file.truncate()
    except:
        file=open("temp.txt","w")
        pb={}
    while True:
        name=input("请输入联系人姓名:(输入exit退出输入)")
        if name=="exit":
            break
        phone=input("请输入联系人电话:")
        pb[name]=phone
    strpb=str(pb)
    file.write(strpb)
    file.close

def FindInformation():
    try:
        file=open("temp.txt","r")
        pb=eval(file.readline())
        name=input("请输入联系人姓名(输入exit退出):")
        if name=="exit":
            return
        if name in pb:
            print("联系人",str(name),"的电话号码是:",pb[name])
        else:
            print("联系人不存在!")
        file.close()
    except:
        print("查询出错!")