你好,编译器忽略if / elif语句,我不知道为什么
我添加了一些印刷品以了解问题的根源,但我没有明白
def decode_frame(frame_dir, caesarn):
#take the first frame to get width, height, and total encoded frame
# first_frame = Image.open(str(frame_dir) + "/0.jpg")
first_frame = Image.open(str(frame_dir) + "/" + "1.png")
print("1")
r, g, b = first_frame.getpixel((0, 0))
print("2")
total_encoded_frame = g
print("3")
msg = ""
print("4")
for i in range(1, total_encoded_frame+1):
print("5")
frame = Image.open(str(frame_dir) + "/" + str(i) + ".png")
print("6")
width, height = frame.size
index = 0
print("7")
for row in range(height):
print("8")
for col in range(width):
print("10")
try:
print("9")
r, g, b = frame.getpixel((col, row))
print("11")
except ValueError:
print("12")
# for some ong a(transparancy) is needed
r, g, b, a = frame.getpixel((col, row))
print("13")
print("aa")
if row == 0 and col == 0 :
print("14")
length = r
print("15")
elif index <= length:
# put the decrypted character into string
print("tt")
msg += caesar_ascii(chr(r), "dec", caesarn)
print("18")
index += 1
print("cc")
#remove the first and the last quote
msg = msg[1:-1]
print("17")
recovered_txt = open("data/recovered-text.txt", "w")
print("19")
recovered_txt.write(str(msg.encode().decode('string_escape')))
print("20")
这是输出
9
11
aa
18
10
9
11
aa
18
10
9
11
aa
18
10
9
11
aa
18
10
9
11
aa
18
10
9
11
aa
18
10
9
11
aa
18
10
9
11
aa
18
cc
17
19
Traceback (most recent call last):
File "C:/Users/HP/Aniss/PycharmProjects/Caesar-Cipher-Video-Steganography-master/main.py", line 103, in <module>
decode_frame("temp", caesarn)
File "C:\Users\HP\Aniss\PycharmProjects\Caesar-Cipher-Video-Steganography-master\functions.py", line 166, in decode_frame
recovered_txt.write(str(msg.encode().decode('string_escape')))
LookupError: unknown encoding: string_escape
Process finished with exit code 1
答案 0 :(得分:0)
错误消息表明该错误在行中:
recovered_txt.write(str(msg.encode().decode('string_escape')))
特别是,decode
方法不知道'string_escape'
的含义;它需要一个编码名称,例如'utf-8'
。
您正在尝试通过四个修改来传递msg
:[1:-1]
,encode
,decode
和str
;这可能不是您想要的。您可能想要将msg
写为文本:
recovered_txt = open("data/recovered-text.txt", "wt")
recovered_txt.write(msg)
请注意"wt"
调用中的open
。