DECODING_TABLE是什么作用
时间: 2024-05-23 19:07:46 浏览: 45
DECODING_TABLE(解码表)是一种用于编码和解码的数据结构,它被广泛应用于计算机网络和通信领域。在通信协议中,编码表被用来将特定的数据编码为二进制或其他数字格式,而解码表则被用来将二进制或其他数字格式的数据转换回原始格式。DECODING_TABLE可以提高数据传输的效率和准确性,因为它允许数据在传输过程中进行压缩和解压缩,从而减少了数据传输的时间和成本。
相关问题
为这段代码添加中文释义import heapq from collections import defaultdict def huffman_encoding(data): # 计算字符频率 freq = defaultdict(int) for char in data: freq[char] += 1 # 将频率转化为堆 heap = [[weight, [char, ""]] for char, weight in freq.items()] heapq.heapify(heap) # 合并堆中的节点,生成霍夫曼编码树 while len(heap) > 1: low = heapq.heappop(heap) high = heapq.heappop(heap) for pair in low[1:]: pair[1] = '0' + pair[1] for pair in high[1:]: pair[1] = '1' + pair[1] heapq.heappush(heap, [low[0] + high[0]] + low[1:] + high[1:]) # 生成霍夫曼编码表 code_table = dict(heapq.heappop(heap)[1:]) # 编码 encoded_data = "" for char in data: encoded_data += code_table[char] return encoded_data, code_table def huffman_decoding(encoded_data, code_table): # 将编码表反转,方便解码 reverse_code_table = {v: k for k, v in code_table.items()} # 解码 decoded_data = "" code = "" for bit in encoded_data: code += bit if code in reverse_code_table: decoded_data += reverse_code_table[code] code = "" return decoded_data data = "hello world" encoded_data, code_table = huffman_encoding(data) print("Encoded data:", encoded_data) print("Code table:", code_table) decoded_data = huffman_decoding(encoded_data, code_table) print("Decoded data:", decoded_data)
```python
import heapq
from collections import defaultdict
def huffman_encoding(data):
# 计算字符频率
freq = defaultdict(int) # 使用 defaultdict 来实现字符频率的计算
for char in data:
freq[char] += 1
# 将频率转化为堆
heap = [[weight, [char, ""]] for char, weight in freq.items()] # 将频率转化为堆
heapq.heapify(heap)
# 合并堆中的节点,生成霍夫曼编码树
while len(heap) > 1:
low = heapq.heappop(heap)
high = heapq.heappop(heap)
for pair in low[1:]:
pair[1] = '0' + pair[1]
for pair in high[1:]:
pair[1] = '1' + pair[1]
heapq.heappush(heap, [low[0] + high[0]] + low[1:] + high[1:])
# 生成霍夫曼编码表
code_table = dict(heapq.heappop(heap)[1:]) # 生成霍夫曼编码表
# 编码
encoded_data = ""
for char in data:
encoded_data += code_table[char] # 编码数据
return encoded_data, code_table
def huffman_decoding(encoded_data, code_table):
# 将编码表反转,方便解码
reverse_code_table = {v: k for k, v in code_table.items()} # 将编码表反转,方便解码
# 解码
decoded_data = ""
code = ""
for bit in encoded_data:
code += bit
if code in reverse_code_table:
decoded_data += reverse_code_table[code]
code = ""
return decoded_data
data = "hello world"
encoded_data, code_table = huffman_encoding(data)
print("Encoded data:", encoded_data)
print("Code table:", code_table)
decoded_data = huffman_decoding(encoded_data, code_table)
print("Decoded data:", decoded_data)
```
注释已添加,方便理解代码的实现过程。
D:\zzz_aotjs>java -jar apktool.jar d zzz_jjtx.apk -o jjtxApk I: Using Apktool 2.5.0 on zzz_jjtx.apk I: Loading resource table... I: Decoding AndroidManifest.xml with resources... I: Loading resource table from file: C:\Users\Administrator\AppData\Local\apktool\framework\1.apk I: Regular manifest package... I: Decoding file-resources... I: Decoding values */* XMLs... I: Baksmaling classes.dex... I: Baksmaling classes2.dex... I: Copying assets and libs... I: Copying unknown files... I: Copying original files... D:\zzz_aotjs>java -jar apktool.jar b jjtxApk I: Using Apktool 2.5.0 I: Checking whether sources has changed... I: Smaling smali folder into classes.dex... I: Checking whether sources has changed... I: Smaling smali_classes2 folder into classes2.dex... I: Checking whether resources has changed... I: Building resources... W: invalid resource directory name: D:\zzz_aotjs\jjtxApk\res navigation brut.androlib.AndrolibException: brut.common.BrutException: could not exec (exit code = 1): [C:\Users\ADMINI~1\AppData\Local\Temp\brut_util_Jar_88738392895362090968935970785959065127.tmp, p, --forced-package-id, 127, --min-sdk-version, 21, --target-sdk-version, 28, --version-code, 23053102, --version-name, 1.0.2, --no-version-vectors, -F, C:\Users\ADMINI~1\AppData\Local\Temp\APKTOOL7172915232282895038.tmp, -e, C:\Users\ADMINI~1\AppData\Local\Temp\APKTOOL4592746138281254561.tmp, -0, arsc, -I, C:\Users\Administrator\AppData\Local\apktool\framework\1.apk, -S, D:\zzz_aotjs\jjtxApk\res, -M, D:\zzz_aotjs\jjtxApk\AndroidManifest.xml] D:\zzz_aotjs>
从你提供的命令行输出来看,打包时出现了一个错误:
```
W: invalid resource directory name: D:\zzz_aotjs\jjtxApk\res
navigation brut.androlib.AndrolibException: brut.common.BrutException: could not exec (exit code = 1): [C:\Users\ADMINI~1\AppData\Local\Temp\brut_util_Jar_88738392895362090968935970785959065127.tmp, p, --forced-package-id, 127, --min-sdk-version, 21, --target-sdk-version, 28, --version-code, 23053102, --version-name, 1.0.2, --no-version-vectors, -F, C:\Users\ADMINI~1\AppData\Local\Temp\APKTOOL7172915232282895038.tmp, -e, C:\Users\ADMINI~1\AppData\Local\Temp\APKTOOL4592746138281254561.tmp, -0, arsc, -I, C:\Users\Administrator\AppData\Local\apktool\framework\1.apk, -S, D:\zzz_aotjs\jjtxApk\res, -M, D:\zzz_aotjs\jjtxApk\AndroidManifest.xml]
```
这个错误信息显示了 APKTOOL 在处理 res 目录时出现了一个无效的资源目录名,导致打包失败。你可以检查一下反编译后的 res 目录是否存在非法的目录名或文件名,尝试将其修改后重新打包。另外,也可以尝试更新 APKTOOL 版本,看看是否能够解决这个问题。