python eval 转换k m到乘法计算的操作

data['Followers/Fans'] = data['Followers/Fans'].str.replace('k|K','*1000').str.replace('m|M','*1000000').fillna('0')
data['Followers/Fans'] = data['Followers/Fans'].apply(eval)

# def trans(x):
#  x = str(x)
#  x = x.strip() # 去除首尾空格
#  if (x[-1]  == 'k' or x[-1]  == 'K') :
#return float(x[0:-1])*1000
#  elif (x[-1]  == 'M' or x[-1]  == 'm'):
#return float(x[0:-1])*1000000
#  else:
#return x

while True:
 try:
  s = str(input())
  print(eval(s))
 except:
  break

print(eval("'Hello world'")) # 输出 Hello world
#print(eval("Hello world"))  # 因为eval()函数去掉外部的双引号后，成为变量Hello world，而之前没有定义过该变量，所以会报错。
print(eval('"1+2"'))# 输出1+2