Question

续

如果它包含除A，C，G和T之外的字母，则打印"Invalid"一次。否则"Valid"只会打一次。例如，如果用户键入ACCFG，则程序应输出"Invalid"

我有这个 - 出了什么问题？

dna=raw_input(“your dna sequence:”)
for char in raw_input:
   if raw_input(char)!=”A”and”C”and”G”and”T”:
       print Invalid
   else:
       print Valid

Answer 1

这应解决它：

dna=raw_input(“your dna sequence:”) # Read line
for char in dna: # Iterate over all characters in dna
   if char not in [”A”,”C”,”G”,”T”]: # If the character isn't one of [”A”,”C”,”G”,”T”]
         print ”Invalid”
   else:
         print ”Valid”

如果您只想打印一次，请将其设为：

dna=raw_input(“your dna sequence:”) # Read line
correct = "Valid"
for char in dna: # Iterate over all characters in dna
   if char not in [”A”,”C”,”G”,”T”]: # If the character isn't one of [”A”,”C”,”G”,”T”]
       correct ”Invalid”
       break
print correct

Python脚本，要求用户输入DNA序列

1 个答案: