Hướng dẫn hàm translate trong python

translate[] method takes the translation table to replace/translate characters in the given string as per the mapping table.

The translation table is created by the static method maketrans[].

The syntax of the translate[] method is:

string.translate[table]

String translate[] Parameters

translate[] method takes a single parameter:

• table - a translation table containing the mapping between two characters; usually created by maketrans[]

Return value from String translate[]

translate[] method returns a string where each character is mapped to its corresponding character as per the translation table.

Example 1: Translation/Mapping using a translation table with translate[]

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

Output

Original string: abcdef
Translated string: idef

Here, the translation mapping translation contains the mapping from

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

0 to

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

1 respectively.

But, the removal string thirdString resets the mapping to

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

2 and

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

3 to

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

4.

So, when the string is translated using translate[],

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

2 and

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

3 are removed, and

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

8 is replaced

# first string
firstString = "abc"
secondString = "ghi"
thirdString = "ab"

string = "abcdef"
print["Original string:", string]

translation = string.maketrans[firstString, secondString, thirdString]

# translate string
print["Translated string:", string.translate[translation]]

9 outputting

Original string: abcdef
Translated string: idef

0.

Note: If you cannot understand what's going inside maketrans[], please refer to String maketrans[].

Example 2: Translation/Mapping with translate[] with manual translation table

# translation table - a dictionary
translation = {97: None, 98: None, 99: 105}

string = "abcdef"
print["Original string:", string]

# translate string
print["Translated string:", string.translate[translation]]

Output

Original string: abcdef
Translated string: idef

Here, we don't create a translation table from maketrans[] but, we manually create the mapping dictionary translation.

This translation is then used to translate

Original string: abcdef
Translated string: idef

2 to get the same output as the previous example.