Use + sign to insert string in python list

a = "sdfg"
b = "ag"
c = "gsrg"
li = []
li += a,
li += b,
li += c,
print(li)
#['sdfg', 'ag', 'gsrg']

No comma at the end of the sentence

'''
遇到问题没人解答？小编创建了一个Python学习交流QQ群：778463939
寻找有志同道合的小伙伴，互帮互助,群里还有不错的视频学习教程和PDF电子书！
'''
a = "sdfg"
b = "ag"
c = "gsrg"
li = []
li += a
li += b
li += c
print(li)
#['s', 'd', 'f', 'g', 'a', 'g', 'g', 's', 'r', 'g']

Or you can use append() directly to avoid the comma problem