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Почему так происходит и как этого можно избежать?

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Python 2.7.12 (default, Dec 19 2016, 15:11:02) [MSC v.1500 32 bit (Intel)]
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IPython 5.7.0 -- An enhanced Interactive Python.
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In [1]: 1+1
Out[1]: 2

In [2]:

{if $_pls['tv.myTv'] == '12345'}
    делаем дело
{/if}

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mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+--------+
| Variable_name                        | Value  |
+--------------------------------------+--------+
| validate_password_check_user_name    | OFF    |
| validate_password_dictionary_file    |        |
| validate_password_length             | 8      |
| validate_password_mixed_case_count   | 1      |
| validate_password_number_count       | 1      |
| validate_password_policy             | MEDIUM |
| validate_password_special_char_count | 1      |
+--------------------------------------+--------+
7 rows in set (0,23 sec)

mysql> SET GLOBAL validate_password_length = 0;
Query OK, 0 rows affected (0,00 sec)

mysql> SET GLOBAL validate_password_mixed_case_count = 0;
Query OK, 0 rows affected (0,00 sec)

mysql> SET GLOBAL validate_password_number_count = 0;
Query OK, 0 rows affected (0,00 sec)

mysql> SET GLOBAL validate_password_special_char_count = 0;
Query OK, 0 rows affected (0,00 sec)

mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+-------+
| Variable_name                        | Value |
+--------------------------------------+-------+
| validate_password_check_user_name    | OFF   |
| validate_password_dictionary_file    |       |
| validate_password_length             | 4     |
| validate_password_mixed_case_count   | 0     |
| validate_password_number_count       | 0     |
| validate_password_policy             | LOW   |
| validate_password_special_char_count | 0     |
+--------------------------------------+-------+
7 rows in set (0,01 sec)